same here followed instructions, no root, tried and titanium backup couldnt get root. on sprint variant. this is what i get
No matching phone found. Got SPR from ADB.
Press any key to continue . . .
Found ATT, TMO, SKT, or D802 phone!
Pushing g2_security...
18 KB/s (288 bytes in 0.015s)
*******************************************************
Now, please unplug usb, go to developer options and
disable USB debugging and re-enable it.
Once you've done that, re-plug your usb...
*******************************************************
Press any key to continue . . .
Waiting for device...
Now it's time to install su and superuser.
Please note! This will trip LG's rootchecker!
This means your phone will show ROOTED in the settings menu,
and in the LG Download mode.
If you do not want to possibly invalidate your warranty
press CTRL-C to stop this script.
You will have a rooted ADB, but no apps on the phone will be able
to access root functions.
Press any key to continue . . .
EDIT #2 found out why needed to use newest IO
http://xdaforums.com/showpost.php?p=48709232&postcount=869&nocache=1&z=1941772759892046