science.. I've only been in the game for about 3 years... and in my experience everything you say holds true.. and about the general idea.. I have personally always kept my veg room on 24 hours cause I never bought a timer for the light.. it's only a 600 in there now so it's not a big deal.. if I was vegging with something bigger I'd turn it off some of the time.. but to be honest with you .. when I have veg'd on less I've gotten less results.. especially with hydro.. with soil.. I'm not sure you'd see much difference. since they don't grow much anyhow.. but the responce that you get from small details in a hydro growroom especially would definitelly convince you to protect your plants from any kinds of stresses, as your looking for FAT and heavy sensimilla buds...
PRODUCE!