Maybe it's an age thing, having watched Allen's and Coryell's teams play I have immense respect for their talent. Allen never coached a losing season and among coaches with 100+ victories has one of the highest all time career win percentages at .681 (.002 behind Belichick) but with the true greats there's more to it than just wins and losses. Like Coryell, Allen was an innovator in every football sense of the word, most of it on the defensive side of the ball but also on special teams. In many respects we have been watching Allen's and Coryell's NFL for most of the Super Bowl era. Sadly with the way D is being legislated out of the game Allen is probably rolling in his grave.