I'm not sure what threads you're reading- but if you would like something to ponder: right now there is a student on the pharmacy student forum who is going through residency matching that is in the Southern Nevada program. If I remember correctly, Nevada recently received accredidation within the past couple of years. So, it's not impossible to get a residency if you're in a "less established" program, or in an accelerated program at that.
I think grades do make a difference- it may not prevent you from getting a residency in general, but I think it may make a difference between you getting one of your top choices vs. whatever you didn't match with and is left over in the end. I think the school you attended and the reputation of their curriculum may play a hand in that as well. You may want to think about posting a reply in the residency matching thread in the pharmacy student forum to get more answers. Pharmacy students will have a better scope on this subject than pre-pharms.