(adsbygoogle = window.adsbygoogle || []).push({}); Does anyone remember the proficiency glitch from MW3?

Well I was wondering if any of you top glitchers out there had tried to give this a go using the CoD app instead of elite?
Now I've tried getting this to work without any joy.
I just thought I'd throw this back out there to see if anyone could come up with an easy technique. There's bound to be a loophole somewhere