I just think that I really react to PH's/DS's. I'm on my second cycle right now doing an H-Drol/Trenadrol stack for 6 weeks:
H-Drol 75/75/75/75/100/100
Trenadrol 60/60/90/90/90
I started out about 225 lbs. I'm in week 5 and right now I'm over 255 lbs. I'm sure some is water, glycogen, and a little fat, but I've added a tremendous amount of muscle, and my strength has gone up like crazy. My wife measured may arms yesterday and they grew 1.25 inches this cycle.
This is just my second cycle, but I really pack on the meat for some reason. Maybe it's my body type (I would say that I'm probably about 75% mesomorph, 25% endomorph), or some other factor. When I read about others gaining 5-10 lbs in a cycle it seems odd to me. I gain that in a week. Outside of a cycle, the gains are much more normal, maybe a pound a week at most.
Who knows? I just want to share my experiences, and it seems to be atypical. Maybe someone else has the same experience.