Christ compels you wrote:
It still blows my mind how Mark Carroll (13:03) ran 7:30.
Well yes, that 7:30 was an amazing run by Carroll, but it should not come as a complete shock since 13:03 is no joke, and Carroll was 3:50 miler, and probably capable of even faster. Once saw him run 3:54 COMPLETELY SOLO (from the gun, no rabbits, low key race) indoors. So he was probably capable of sub 3:50 mile, and 13:03, and thus maybe 3k was his likely best event. Kennedy was not as fast as Mark at the mile, and also ran 7:30. So Carroll's 7:30, while amazing, is not a complete shock.
Solinsky, while a pretty good miler in his own right, has shown his true strength is his strength, and appears more likely a 5k/10k guy than 3k/5k guy, and certainly not a mile/3k guy. His 5k and 10k times are 1.024 and 1.027 x the existing WR's in those respective events. If we multiply those #'s x the existing 3k wr of 7:20.67, we get a 7:31 or 7:32. So assuming the 3k WR is on par with Bekele's 5k/10k records (and many think it is at least as good, if not superior), Solinksy would have to run BETTER at 3k than he has at 5k/10k to run 7:30, let alone break it. Now again, if were more a miler type like Carroll, he'd probably have a better chance.
Of course Solinksy has run better than Kennedy at the mile, but Kennedy showed good mile speed early on in his career, and didn't really attempt a fast one as he got better. So Kennedy was probably capable of a faster mile than he actually ran.
All this is conjecture of course, but it would likely take a run on a level that is probably better than what he has already shocked us with at 5k/10k to better 7:30. I wouldn't expect it.