I think 95% of all the pro's use a 'wristaim (+finger)' style, regardless of sensitivity/accel they use. To be honest I know no pro's that use forearms to aim. Tip my hat to those who do though, I would hit absolutely nothing under those circumstances.

Alborz, Sens 5, 400dpi, 1000hz, no accel, default yaw & pitch, wrist + finger . 21cm/360.

I disagree.

Most common is a 70/30 mixture of forearm to wrist.

Take av3k as a counterexample:

http://www.youtube.com/watch?v=WdZbTNPn5KI

im not sure how low sens strenx uses nowadays, but he needed shit load of desk space back in the 2010