I went to Vance, and without a doubt I winged way faster, in fact out of my class I winged 2nd or 3rd, BUT that was before the Navy straightened out the flight training pipeline. It was also before you selected a primary location after API. I did not do API I went straight to Vance. With all the changes, I would guess that the "wing faster" arguement might be rumor from the "old" days.
That being said, it was alot of fun. The AF class camaraderie is awesome (if your class gels) and it is very beneficial for studying purposes and just the motivation to get through the "boot camp" style flight school (IMO that is a harsh description). In fact I keep in touch with several of my AF classmates.
If you have a family, that is a good place to go, Enid is a great family town, it is not a great single guy town. Another positive is that you can see a little about how another service works.
However, it is a more stressful style of program.
When you get back to the Navy, you don't know how Navy flight training works, and you are a little behind the power curve.
Also, sometimes Vance can leave a little to be desired in Navy admin support. I have a fitrep continuity break from that time because my detaching fitrep never made it to BUPERS.
There are pluses and minuses to the whole thing, but in the end, I am glad that I went to Vance.