Diving the P-47D-30 from 30k at MIL power straight down, you will lock up at 550 true air speed. At this point you have almost zero control. You can pull out of the dive, but to do so successfully (without use of dive flaps) requires throttling back, trimming up elevator, and letting the nose come up slowly, pulling about 5-6Gs. It is possible to aggressively pull out, but not at sustained > 9 G as is suggested here. Once you slow down below compressability speeds, the aircraft noses up hard and once you exceed 9G your head explodes (you find yourself in tower 'heaven' suddenly) or you'll rip a wingtip off.
Diving the FW-190D9 or A8, you will lock up at 575 mph, 25 mph faster than the jug. P-51 is about 565. Typhoon is tough to gauge since you have to view the TAS in film viewer and watch where it locks up there, but it looks to lock up at about 565-575.
Frankly, I don't see what all the fuss is about. Maybe someone can explain it to me.