There are numerous, if anecdotal, stories indicating otherwise.

There are also some anecdotal stories of people now having trouble due to having multiple Google accounts.

I won't accept my invitation until 1) I know it can't bork my access to Gmail, Calendar, Docs; or 2) I can use it under a different Google account without worrying about being whacked (I don't have a detailed knowledge of these supposed events) for having "duplicate accounts".

I agree with other comments, here; unless you're one of the "beautiful geeks", historically Google support is, well, not so much.