I must say that ruff does give you a really hard time and like you said regardless of what answers you give in return. I actually think the times you have given for the M-DCT is as good as we can get given that there is currently no actual data and spec to work with.
It's doubtful that BMW will alter the character of the M3 engine to this new gearbox though in fairness it would be a very simple thing to done and might be beneficial.
Will the M3 with M-DCT match either the C63 or IS-F to 150mph, definitely NO against the C63, it extra power and way more torque will always win in such situations. As for the IS-F, that's a trickier one to answer, I reckon the IS-F will win but by the smallest of margins.
On the track, sorry but there is no substitute for the engineering in the M3.