In such case even people in US administration would have been surprised.
I think USA already knows how Israelis and Pakistanis exploit full potential of F-16.
Block-15 is a really extraordinary dog fighter. In 1980's, Israelis gave it a good repo in ground attack role in Iraq and Pakistanis made full use of it to bring down Soviet and Afghan aircrafts. India got insecure with 40 F-16 fighters that IAF ordered two types of aircrafts (Mirage-2000 and Mig-29) in response. Mirage 2000 for strike and Mig-29 for air combat, where as PAF covered both roles with F-16.
There are some small factors in F-16's design itself that gives it advantage in dog fights. It has a lower angle of attack, which gives it less drag and conversely it's fuselage lift is very high. F-16's horizontal tail is strongly loaded, assisting in more lift. This helps it maintain higher energy at low altitude dog fights or WVR Dog fights. It can pull high G's (depends on load carried also), so the pilot gets a lot of flexibility in maneuvering the aircraft, taking it to its limits without concerns.
Being single engine aircraft, F-16 was still found to be a good BVR fighter. For high altitude BVR combat, the upgraded Radar or the AWACS gives situational awareness, Link-16 data link is very robust (its rumored to be two way), the Aim-120 C5 is hard to defend against and F-16 has very good eccm capabilities.
You can see the biggest advantage that F-16 got is that it was built to be a nimble dog fighter, so its WVR domain was already covered, where as other aircrafts (F-14, F-15, F-18, SU 30 etc) were usually built for BVR combat or heavy strike roles. F-16 lacked at both these (BVR and variety of strike role) at first, but got them covered as Block 40/42 and 50/52 were strike oriented aircrafts, and capable of carrying different ground/naval strike armament. In the mean time, it was capable of firing Aim-7 sparrow BVR missile, however became more lethal through Aim-120 AMRAAM. So it now covers all roles of combat efficiently than other aircrafts: WVR, BVR and Strike. It does lack the range than other heavier aircrafts but it delivers the punch for being smaller than others.
You can imagine it like a little terrier in a dog fight, who never runs out of energy when fighting with a big dog and take down the big dog through its raw stamina of jumping, showing up from left right front behind and snapping with sharp bites everywhere.
In any air combat, starting from BVR combat at high altitude at long ranges, its first look and first shoot, F-16 can fire its AMRAAM and when the surviving aircrafts meet in WVR arena, F-16 will hold advantage and make the remaining kills to finish off the fight.
In terms of strike role, Block 40/42 carried targeting pods, FLIR and were night strike capable. Block 50/52 and 52+ further improved and were capable of carrying more strike weaponry. The Block-15's flown by PAF were not lacking just BVR missiles but also were incapable of firing many strike weapons (A2G missiles) apart from carrying older avionics and sensors. Through MLU, the Block-15's have been brought on par with Block 52+, barring CFT's and engine.
F-16 is truly a multi role aircraft. Hopefully, JF-17 will reach the same stage or better soon. F-16 pilots know that the jet they fly holds a lot of strengths against its potential adversaries, which makes them very confident to fly missions in it. IAF has trained well against F-16's from different countries for taking on PAF F-16's, and now know that F-16 has got multitude of strengths and very few weaknesses. In past decades, IAF faced F-16's carrying 6 x Aim-9 , where as now its known that F-16 will be carrying 2-4 Aim-120 C5.