The intent is not to turn this into a bashing thread, BUT:
As for the exhaust tips...Lexus has already made a statement that this setup aids in exhaust flow, creating a scavenging effect. So it's not a "gimmick" as it actually serves an engineering and performance purpose.
To me the "fake" exhaust tips are no more weak than say the fake air vents on the front fenders of a BMW.
FWIW I looked at the new M3, C63 and IS-F and chose the IS-F.
p.s. I sold my SSTT 335i to purchase the IS-F
2014 M5 Alpine White/Black
2013 UGR SL TT White/Black