I agree with getting there more than one hour in advance of the flight. There was something on the news the other day about Orlando having a new system for its frequent travelers to avoid the long security check-in. I think it always takes us at least twenty minutes to get thru security at MCO. In January, on a Monday, it took us 45 minutes to get thru all the security lines. Two weeks ago in Atlanta, we almost missed our flight because our connection ran late. They called final boarding 10 minutes prior to the scheduled departure time.
I think I allotted 25 minutes the last time I drove from WDW to MCO on 417.