User blog comment:ClariS/Unofficial PBE Patch Notes (148)/@comment-4431813-20120915115339/@comment-169.229.103.107-20120916050952

5 move speed makes more of a difference than you think when you're chasing someone down a lane. Or running away. Also, vayne certainly isn't like other AD carries as her steroids aren't the best, but in the right hands she destroys everyone, INCLUDING bruisers. No other AD carry can 1v1 xin zhao, rengar, etc.