I bet the F16 is flying at stall speed to keepup with te Jug!
Not quite.
The F-16 would be able to comfortably stay with a P-47 in flight without worrying about stalling. And technically, I'm pretty sure the F-16's onboard computer wouldn't allow the pilot to stall the plane, it would take over before a critical stall occured, unless he was in override mode.
Awesome pic though, I love seeing old warbirds flying along side modern jets.
Regards