Joe van Tunen - 2011-09-22

If you mean verbose mode flag in nvram boot-args, then it shouldn't affect rEFIt since that flag only affects Mac OS X booting and rEFIt occurs before that. But you can try disabling it.

I think some people have gotten rEFIt to work with MacBook Pro 2011 but with some problems:
https://sourceforge.net/tracker/index.php?func=detail&aid=3392210&group_id=161917&atid=821765
https://sourceforge.net/tracker/index.php?func=detail&aid=3393024&group_id=161917&atid=821764

rEFIt works without problems on a MacBook Air 2011:
https://sourceforge.net/tracker/index.php?func=detail&aid=3410464&group_id=161917&atid=821765