Stretching and jelqing are very different.
Extenders are worn for long periods of time... maybe 1-12 hrs depending on comfort and your own tolerance level. Its much like hanging, but A) its not as hardcore and B) less presure, but used for a longer time period.
Jelqing works more on the girth, but also affects length. Ive tried jelqing for a short while and think it really does help. Gona try an extender soon too WITH jelqing and see what happens over a period of upto 6 months. Have always been curious to see if both would work. If i could get somewhere between 7.5 & 8, id be VERY impressed!!
Thudersplace is awesome for PE info. But you can never register as they are only alowing 95,000 members! But you can still read the threads and read the guides etc...