supercruise for LM is M1.5+
LM saying that is a bit like BOEING trying to redefine what a thermal runaway is in regard to the 787 Flatliner's battery woes, it suits their
PR bilge. Supercruise is widely accepted as being the ability to maintain supersonic flight with a useful weapon/fuel load without the use of re-heat. I assume the quote about the F-35 being able to do a 150 mile dash at M1.2 was with an internal weapon load? Typhoon has demonstrated supercruise with a useful external load so your assertion that no current 4.5 gen fighter can match the F-35 may be a little flawed...
-RP