Re: 160 speed shows as 140.
Mine's capped at 140 too (34 from equips, 30 from mastery), but I've noticed that with decent haste, I can get to 160 (and its actually faster; takes 9 seconds to travel a certain distance vs. 10 seconds without, though that could be inaccurate timing on my part. I'll test longer distances tomorrow).
Screenshots:
http://retalion.files.wordpress.com/.../maple1147.jpg
http://retalion.files.wordpress.com/.../maple1150.jpg
Ps. Ignore my vastly inferior range ):
Edit: Just tested. Walking across all of magatia without decent haste: 37 seconds.
Walking across magatia with decent haste: 32 seconds.
Confirming that there is a difference, and that 140 is indeed 140, and that 160 is obtainable, through skills and not innate.