German Car Forum

I think Motor Trend is biased enough to bring M5 with a 6-speed manual transmission for the Caddy to beat it.If they chose SMG the story would be different somehow.In my opinion, M5 was designed with 7-speed GEARING and high revs in mind and that is the philosophy of a 8250RPM high-revolution car.This competition is unfair for me but still with a 6-speed gearbox, M5 did very well against CTS-V.

Motor Trend is equally biased with ZR1 too.In all their comparison tests they praise ZR1 more than what it actually is.In one of their tests they said that ZR1 eats LAMBORGHINIs for breakfast or lunch! however, LP640 is as fast as a ZR1 in a straight line and LP670 simply kills it.
I love ZR1 as a highly praised supercar but it is not as good as MT tries to prove.

Apparently the M5 is faster at higher speeds:

Autocar Videos - Autocar.co.uk

Clip comes towards the end.

But the Americans seems to like the manual one and if that model is the most interesting on that market, they should test that one.

This is a magazine, not a test institute with the puprose of bringing the total and final truth. They test cars based on the demands of the market they operate in, giving opinions based on the local preferences.