Just tried this, its very fiddly don't know if I can get used to it
If you add any weight into your touch it doesn't register your movement. Btw I tested it on D430 so might be different on the larger latitudes.
I'm currently on EDP 1.4 so was stuck in debug mode before this which was super slow, has this problem been fixed in 1.5RC? Been putting off the update since I've got pretty much everything else running smoothly.