Ive had both my Z and M3 at speeds and I wouldnt say EITHER of them felt nothing but planted. I also would not let go of the wheel at speed, so that holds no merit. I loved me ESS E90, but the Z is a far nastier beast.
2014 ZL1 Speed Inc 799/751
2011 E92 DCT ZCP Stock
2009 Z06 Speed Inc Built
2008 E90 6spd ESS-Meisterschaft GT-AA Catless X-Volk TE37