That thread mentions someone saying boosting, even with an unlinked character, don't work since 3.0.2 - Can anyone confirm that boosting still works?

I'm debating getting 2 new RAFs and just boost them up and transfer to get the characters I need for my mixed team - But I would much rather get the mount and free month on my main account than not - So if someone could confirm linked boosting working that would be even better :P

Edit: I know that this boosting never worked: A RAFs B, and then A tries to boost a character on B. However, if A RAFs B who RAFs C, shouln't B & C get their RAF bonus from grouping even if A is in there with a level 80 character?