Lone,
To be fair, it was the Army themselves (and Sikorsky over the years with their presumed greater hover maneuverability) who had been touting the value of exceeding ADS-33 requirements and the (preposterous) idea of dodging threats from slow speed/hover.
It was always the knock against tiltrotors, hence why the V280 added massive amount of flapping to address the V22's relative sluggishness. Bell always argued the survivability was not from dancing around a seeker, but flying high above the threat, faster, and eliminating the time time on station. The Army should really have recalled the AH-64 fights in Najaf to remember why the doctrine immediately changed from lobbing munitions from a stand off hover to constant high speed strafing attacks.