I have an unscientific method I use to determine my relative prestige ... basically, the pre-season rankings that come out (Coaches and Press Polls). In D1A, one of them ALWAYS lists the top 14 teams as the 14 elites regardless of recent results so I use that one. Once you get outside of the top 40 you basically have 0 prestige so avoid recruiting battles.
I haven't paid attention to whether or not bowl wins specifically impact this, but it generally takes a while of sustained success to get a non-elite into the top 20. I'll check the rankings next year to see if there are any non BCS schools because we have some in Warner that have been decent for a while, but it might be that they automatically go behind all of the BCS schools (who are all automatically behind all the Elites),