You can be a top five team with two losses obviously, so it's not a huge stretch to have 3 from one conference, but it probably will be "unusual".
If Georgia can find a QB and OL this year, they should be very good. Something was missing on offense last year, at least when their two top receivers were out. Florida has the disadvantage of being paired with LSU in the West, if you think LSU is a bit better than Auburn, and to date they have not recruited as well as UGA.