ACC will have a "flow-through" to being the pilot of Air Force One before they have one with UPS. For several reasons, it's simply not going to happen.
Yea, 2-3 (or more) years is a long time in that kind of work. Working for ACC was a pretty good choice for most of the people I know who went there. If you're young and single (you can afford to live on next to nothing for awhile) and you're willing to work hard under less than ideal working conditions, I'd say its a decent choice for somebody with 500-1000 total time looking for their first turbine job.
It's an especally smart choice if you wan to fly corperate or fractional. There is probably no faster way to 1000 Turbine PIC. Way faster than the regionals.
Oh, I forgot, quite a few guys at Omni now also.
Good Luck