Although, as far as I know, nobody really knows what all he was using, I'd have to say he used more than just d-bol. You should at least throw in some sort of Test.
hell yeah, i gained like 12 pounds in 2 weeks, and alot on my strength, in just 2 weeks..i had to stop for other reasons though..going back on very soon!
Dbol is the fucking shit. You blow up quick. 10-15 lbs in a few weeks is pretty typical. But, easy come, easy go with dbol. A dbol only cycle will not give you good long term gains. As soon as you get off of it, you will lose the majority of your gains. Oh, be sure to have some anti-e's on hand, dbol flares up my nipples quick.