Not sure if it has been mentioned anywhere but I changed my gamertag after doing about 400 wins. Thought it might have reset my wins but it didn't. Just in case anyone was worried or had done the same as me, I can confirm that it does not effect your wins.
Looking To Boost on:
Resident Evil 5 (DE PRO)
Message me and send a F/R if you're interested.
I'm blackbelt at making a sandwich.