Board Thread:LOC General Discussion/@comment-216.125.251.254-20130204164334/@comment-5706972-20130515121142

It is hard to say - the lower skill levels will give you a higher percentage more easily, so it 'seems' easier to skill up. When you are at the higher levels you have a lower % chance to succeed.

Bottom line - even 99% has a chance to fail - only 100% is guaranteed.