This might be better posted in the ATP section, and I would imagen a mod will move it shortly but anyhow...
Yes, 90 day people do take priority but in general it isn't a problem. I only remember a few times when I had to push off a 10 monther because of shortage of aircraft or time. I've always felt that the faster program was easier to do for the student, as they tended to do beter due to recency. If you do the self paced program make sure you set a firm schedule with your instructor and stick to it.