Possible Work Around for Factory Reset Method - Nokia Lumia 920

So as everyone know, the 920 has the habit of "Spinning Cog" while Factory Resetting and i do hope that some of you guys haven't had to faced it yet. If you don't know what i am talking about, please google "Nokia Lumia 920 Spinning Cog" and you will have everything.
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Thanks to MyNokiaBlog for the pic
Now, what caught my attention is, a few days ago, i was on the chat with one of the Nokia Supporter Agent, because i am about to send the device in for RMA process, and i was doing the factory reset,and indeed, the phone was stuck at the spinning cog for 3 hours straight. So, i asked her about that problem and she said that "look like the device doesn't have enough power to boot itself up" (or she may mean that the device doesn't have enough power to reboot itself out of the resetting mode). It was kinda dull at first since i had charged it up to 100% , then disengaged the charge , before the factory resetting, so i thought the device has enough power.
So i had to get myself out of that state by doing our favorite : ROM Flash with Nokia Care. So i did and the 920 lives again, but i wasn't able to send it in right away so i set up the phone again for my daily uses. But now, i am ready to send it in, so i did the factory reset tonight but with something different. I charged up the device to 100%, removed the sim trey (might not be anything but just for the reference) , and then plugged it in the PC, before i hit the factory reset button. And the phone performed the reset successfully.
I was surprised, because i flashed the same ROM when my phone hit the spinning cog for the first time back in June, and this time, it performed the factory reset successfully without any problem. There are only 2 differences that i can think ,
1. I didn't load my 920 up with any media this time, so it wasn't filled with musics, videos and stuffs. (could explain why it was able to perform the reset under 10 mins)
2. it was plugged in with the PC when i did the reset
So, what is the TL;DR version of this?
Before doing the Factory Reset on Setting->About, charge the phone to 100%, then plug it into the PC before resting and hope for the best, let's me know if this is a *worked* Work Around.