I'm about 2000 strength, more or less. I can beat an 1300 or 1400 regularly, down a queen, while giving 5 to 2 minutes odds, and letting him take back four times in a game at his own choice (including taking back a couple or three moves at a time - this counting as two or three takebacks, respectively). Tried and proved.
Down a queen I don't believe.
Even a bright guy who just learned chess that very same day should be able to beat you with a queen up.
Then the time advantage is really overrated: if a player is much stronger than (i.e. 400+ points) you he'll just predict everything you can possibly do and prepare an immediate answer during your own thinking time.
On the other hand, when I was like 1850 or 1900 strengths, I used to play against several 2500 GMs with a 1 minute to 5 minute odds in my favor. One of them beat me 14:1. One other, 8:4 - only with the third GM (strangely, the strongest of the three, and an ex candidate) I had a respectable record at this time control - then we moved to 1 minute to 3 minute and he would beat me like 6 games to 3.
Just to give you an idea...