All I know is that when I was down for my "Super Day" of interviews, none of the candidates for salaried positions were from the College Program. There were a couple who had done Disney Professional Internships, and the rest had held internships at companies like PricewaterhouseCoopers, JPMorgan Chase, McDonalds, GE, and Exxon. For reference, there were 30-40 candidates applying for 10ish positions.
When you refer to the "managers" at the parks that get promoted from the rank-and-file, what kind of position are we talking about? I worked in fast food all through high school, and we had "managers" who made a dollar or two more per hour than the regular crew and wore a different colored shirt. I don't know how it works at Disney, but if its along those lines then I still wouldn't consider the CP a "career building" opportunity.
I certainly understand that money isn't everything and that there are various opportunities within Disney Parks and Resorts, but this might go to what previous posters observed about a lack of 25-55 year old cast members "on stage" at WDW.