I ended the weekend with 4 new level 50s running them solo. 49 - 50 took about 45 mins lol.
It is a pity they have the level requirement at 45. Also in 1.8 EI will be a choice for IA, I wonder how that will hit things, my observation currently is that there are uber geared players farming the IA for XP , shards etc, they will move to the EI IA I would think, which may slow the XP a little in the old world BUT that only affects 45 - 48 if they keep the current requirements.