As poplars mentioned there is a lot of different possibilties in the seeds. You may have one that tastes as advertised but not another from the same parents. I have also read that smell and taste can be hard to stabilize because it doesn't follow the mendelian principles other traits follow. A good way to get thhose flavors would be trying clones if you can. Generally a clone will be a superior phenotype of a given strain, or even if it isn't relly the strain bubblegum, would more likely have that taste/scent if it's called bubblegum and your results will be uniform because it is part of the original parent it came from.
I have had some strains that have that bubblegum smell/taste. It wasn't very strong but it is there. I would say it reminds me of putting the cheap pink bubblegum in your mouth and not chewing it. There are alsostrins tht have a more intense aroma, one I smoked tasted like the striped animal gum, I can't remember what that's called. I have also had orange, grapefruit,lemon, blueberry, diesel, skunky, fruit loops, bannana, cotton candy and other flavored herb.
