LvL Progression

Currently I'm running 4 shammys behind my lvl 70 prot pally,6 days 12hours to achive lvl 61 ,probably 90% was instance lvled ,very little rested exp, was wondering if this was on par for other multi boxers.
lol 40minute ramps behind my 70 prot pally when they were lvl 57.
btw prolly the most fun I've had to date playing wow, lvled 7 lvl 70s prior to finding all these cool ways to multi box ,use to 2 box from two PCs ,now i run 5 games with one PC and 2 monitors,quad core affinitys ftw.
As for killin gankers...OMG 2 lvl 70s wearing S2 (elem shammy,S priest)tried to gank me zoning out of ramps ,the operative word was tried dropped 4 grounding an then spammed my totem sequence ,then killed them before my groundings were all burned up.If that isnt reason enough to multi box I don't know what is ,can't wait till they are 70,and can hook up with my current lvl 70 shammy.

i got targetted by a mage in thelsamaar (yes its an ally only zone but i had just come back from badlands, so i was flagged) who started casting pyroblast, i started my totem dropping sequence and with my groundings down i nuked him, he was ?? to me at 42 so i presume 52+ must have been a surprise when i dropped him, so many resists though.