"experience of the past" for sure. I do recall someone saying that you don't even grow anymore. As for seasoned horticulturist, your profile has like 3 pictures of buds in it. Your avatar photo looks like you took it with a Polaroid 15 years ago and yeah that's a nice looking plant..I achieved the same or larger on my first grow. Funny how you demand everyone to back up their claims with multiple successive grows with control groups yet you readily sputter out your "snake oil" spiel without any of the same controlled studies to back it up. Hell, its your signature for crying out loud. You got some P values and anova anallysis numbers for me too look at to determine if there is no statistically significant difference, would love to see it.
I'm just a sucker for slick advertizing with no real understanding of much of anything really. Even though I graduated cum laude with 400 level course work in genetics, organic chemistry, plant physiology, plant ecology, commercial horticulture, and population dynamics I am still unable to make informed decisions in the horticultural additive realm.
But, since you did ask "oh yeah, what are they" (Hormones) . The specific hormones in shooting powder that are also used in the commercial flower trade are auxin, gibberellins, and I also suspect that it contains cytokins but when I spoke with the people at house and garden..they would only tell me "hormones produced from bacterial processes". I didn't expect that they would distill down their whole manufacturing process for me as most of these companies keep their formulas very well guarded but cytokins are produced commercially from bacteria and they work in concert to increase flower production and delay senescence. The suppression of senescence is really the key here and the reason that maturation is slightly delayed when using shooting powder (about a week to 10 days). This info is sourced from the book Life:the science of biology which is sitting on the book shelf in front of me.
Here is a link to some of the discussion on the role of plant hormones but you only get to read every other page. You have to pay money to the snake oil salesman to get the whole book..
http://books.google.com/books?id=ANT8VB14oBUC&pg=PA786&lpg=PA786&dq=hormones+in+commercial+flower+production&source=bl&ots=cxWL6xKlba&sig=L6VttCAs0QbtvynrZa7TWPPBCUg&hl=en&ei=_KUsTZizKZC-sQOr1uCHBg&sa=X&oi=book_result&ct=result&resnum=4&ved=0CCwQ6AEwAw#v=onepage&q=hormones in commercial flower production&f=false
If anyone is actually interested in plant hormones and what they do or has something to add besides conjecture I would love to hear it. Here is a link or two about plant hormones to get you started.
http://www.essortment.com/all/whataregibbere_rjdn.htm
http://www.biog1105-1106.org/demos/105/unit5/media/planthormones.pdf
http://www.420magazine.com/forums/how-grow-marijuana/72181-what-do-hormones-growth-regulators-contain.html
http://www.plantphysiol.org/cgi/content/abstract/50/6/759
the absolute best source for information is the book I quoted above. It is VERY dense reading but you will find that if you have a basic understanding of how these hormones work and are able to speak intelligently about them, if you contact various nutrient companies they enjoy talking about what there products contain and the strategy that they are employing to get results. They are not going to e-mail you tests showing their EXACT compositions and make ups and not should you expect them to. If you called pepsi and asked them, "hey, what are the exact components and concentrations of the compounds in your product" they would laugh at you. It takes money to develop these formulas and they are trade secrets. Just as KFC wouldn't tell you what spice concentrations they use, nutrient manufacturers are not going to divulge this information to you.
I only posted in this thread because the... this is all marketing snake oil bullshit and all you need is fertilizer sold at walmart... statement is in my view, a narrow minded over simplification of marijuana production, plant physiology and the role that additives can have.