No i don't dude i get over a lb per plant.But i only do 2 plants per grow,x 2 lb.That is dry cured bud.normally a few oz over 2 lb from the two,i use two 600 watt h-p-s lights and a auto pot set up.
To be honest, i think the only grower's to get grm per watt are the growers growing large amount of plants under a decent amount of light,bit like the set up medi grower has,
1200 gram = 92 oz now that would be hard to get from my room,I think jorge cerventis was the first to come up with this gram per watt thing,years back i have seen a few of his seminars and to be honest he be lucky toget 4 oz dry from some of the plants he shows that he is growing.Just a hype a lot of it to sell products be it books or nutrients,i'm not saying that it can't be done because it can but only by a few that have the space and money to get the room's done in a way they can get large yeilds per plant but also doing a few of them.