After earlier discussions I lowered my blower speed from "high" setting to "medium/low" setting and getting longer run times 15-20 mins versus 8-10 mins. I was able to find specs on furnace blower speeds via Carrier website. According to their site the "high" blower setting is 2400 CFM, "med/low" 2200 CFM, and "low" 1700 CFM (5 ton/12 seer unit). My question is if 400 CFM per ton is the ideal fan setting then why in the world would they default set the cooling fan speed on "high" which is 2400 CFM (6x what you need)!
Does this sound like accurate information or is there much more to it?

Thanks for all the help.