For the older crew here ( that includes me):

http://netforbeginners.about.com/od/forumsandlists/f/whatisQFT.htm
Answer: This peculiar QFT acronym expression stands for "Quoted For Truth". It has two particular meanings when used in a discussion forum.

1) QFT is an expression of agreement and support, where the user stands behind you and one of your statements. This commonly occurs in controversial topics where opinions are very heated, and people will choose sides in an argument. If someone "quotes you for truth", they are paying you a compliment, and siding with you in the discussion.