Oh lordy, that is truly laughable.
In the modern FAA ex USAF controllers are able to handle the upgrade to FAA Enroute; but only because of lower requirements and FAA's 'no-fail' policy.
Prior to that, they were normally inferior to new hires off the street.
My 35 years were all Enroute, starting with 13 years at Chicago Center, the busiest facility in the world, with NO computers, limited radar coverage, hand-written strips, following targets by pushing plastic chips across the screen, relying greatly on time/speed/distance calculations in your head.
The initial CAA cadre did have a lot of AF guys, only because the job was basically unknown to most. Once it got some ink, the AF numbers dropped radically.
Perhaps the AF guys do better in TRACON/Tower crossovers, but it just wasn't so in ARTCC upgrades.
After the USAF came to the rescue for Reagan, the hatred the FAA management and controllers have for the USAF, well you can cut it with a knife.
The FAA likes Navy controllers as hire-ees, but they despise Air Force Controllers.