After using ML for a while, it seems to me that a more finger-friendly feature would be a click-window-drag initiated normally (as in W7), but with Alt, Shf, or Ctl depressed. Once the time-to-start-drag is completed, both the mouse key and enabling Alt, Shf, or Ctl key could be released. The drag would be terminated with a mouse click or key click.
Thanks for the request. I'll see if we can add it to our list for a future version.
Tim Smith - PC Magazine