Super one click doesn't work for my LG Vortex 2.2.1 at all and I've followed all the directions (turn of USB debugging, turn it ON, unplug USB cable, reboot, etc).
However, all is not lost for Vortex users. Go here -> http://breakneckmod.co.cc/downgrade.html
This gives you the files you need to revert your Vortex back to 2.2 and you can bask all the glory that is root! Just follow the directions carefully and within about 6 minutes, you'll be back in business.
I can attest to the fact that this does indeed work.
Avoid 2.2.1 upgrade at ALL costs (until someone figures out a way to root it).