That's a tough question to answer--the last part of it. Yes, I jelqed for three months. That's all I did for three months. Then I added the stretches in the four month, and that's when my gains came incredibly fast.
Not very scientific, I know. I always ask myself, "What if, during the first three months, I had done the stretches WHILE jelqing?" I'll never know the answer to that question. I know that is how DLD started out--doing both jelqs and stretches. And I respect his approach very much.
I think the best approach here is to stick with whatever routine you establish for at least three or more months and see what happens. Then switch routines or increase the intensity. I do agree with those veterans who say you have to shock your dick, much like some other body building routines, if you want to continue to experience gains. I guess that's what I did when I added the stretches, although at the time, it was strictly trial and error. I did this all on my own at the time. I didn't join a forum until later.
I hope this is of some help.
Goin'