I thought that Bill Sweetman's comments about the F/A-37 Talon design were interesting:
http://www.popsci.com/military-aviation-space/article/2005-07/science-stealth
Bill Sweetman, a noted aerospace analyst and a Popular Science contributing editor, had mixed feelings about the “imaginative creations.” He says, “Black-project buffs will recognize the swing-wing aircraft as first cousin to Northrop Grumman’s top-secret Switchblade fighter. But don’t even think about going supersonic with those tiny engine inlets. They’ll be breathing nothing except turbulence and junk at any speed above Mach 1. Also, the sharp bulges will send a fat radar spike dead ahead, just where you don’t want it.”
http://www.popsci.com/military-aviation-space/article/2005-07/science-stealth