I actually started tracking this because I was doing so poorly. In 11 feuds I’ve got a 4th place (“Batter Up” just a couple of weeks ago), a 7th place, and the rest in the bottom half. Worst was a last place finish back in December, which put me off playing entirely until my almost-stunning come-back with the 4th in “Batter Up.” Success was short-lived, sadly, as I’m back down at #42 in Food Fight. Gonna have to keep at it!
I’ve one the Feud twice, IIRC. I usually finish somewhere between 15 and 25, though I’ve had a few utter stinkers in recent months. 
I did a search of all the times Dolores Reborn has used my name in a post, and was shocked to discover that I’ve done upwards of 200 of these things since September, 2009.
And the best I ever did was 9th place. These days I feel proud of myself if I make the top 25.
I have only participated in 3 feuds (2 that have been scored and the current one). 15th in the first and high 20s in the other.
I got first once. mostly I am solid mid pack kind of guy, but I had a few high scores and a few stinkers.