A common misunderstanding. In BJJ you train stuff that is designed to help you deal specifically with larger and stronger people. I regularly get huge guys come into my club and when it comes to sparring they clearly want to test the art out. Generally I have no problem subbing them out.
where the confusion comes in is the fact there are weight divisions at comps. But comps are not general training. And the reason they divide by weight is that they also divide by skill level. In other words, when skill level is approxiamtely even, of course size makes a difference.
Thanks for the correction. I think as with any art it comes down to skill. As you said if skill level is the same or not good enough then size makes a difference. I was wondering how that transfers to self defense. The dude who started this thread is making his choice based on that. Does generic BJJ differ a lot from say BJJ tailored for self defense?