Yeah right, m.m. just post a link to those USAAF flight tests that give actual figures then..
Or were they just wiki-mythical?
& FYI the Tempest I prototype was tested at 470+mph in 1943..
& so, sure those porcine Jugs could wind out up-stairs where their fat-bellied airframes had less drag,
& their turbo-chargers kept on pumpin'.. ..for a little while. 'til they over-heated , or gas-hogged all their juice..
-but at those Sabre-Fury best - lower altitudes, they'd
be barbequed like crispy roast pork, mmmm...aaarrghhh, as Homer J, would put it..