I am running win 8.1.1 dp on Lumia 520 and I am experiencing a lag... I just wanted to know that anyone running the 8.1 update(not the dp one) on 520 experience the same...
Yes, but Cyan more or less applies for the update from 8.0 to 8.1. You will most likely have a firmware update, Denim I believe, to take you from 8.1 to 8.1.1/Update 1.