The multitouch Trackpad support on Linux is very solid if you know how to setup it. I use a Magic Trackpad since 2011 and it works really well with the synaptics driver (the default) + Touchegg in userland. Try it: https://code.google.com/p/touchegg/
My config file: http://sebsauvage.net/paste/?4ae46e2d7c6c50a7#RstzB7F9cH1wfPzf5H7fycPGLKnV+UcAuOpKqHYuCcY=