I would assume the 1-3-3 schedule would be if you were using real fruit or puree vs extract for the fruit flavor.
The extra time in secondary would depend on the fermentation of the natural sugars in the fruit. I use the same schedule for my Peach Cream Ale (only I keg almost all of it and start drinking it after racking from secondary).
If you are simply using extract you wouldn't need to worry about extra fermentables and could just to a 1-2-3 for regular clearing and rounding of the flavors. If you do use real fruit or puree calculate how many extra points will be added by the fruit and wait for your FG to go down and fermentation to stop.
Something you will notice is with fruity wheats you have a bit of a battle. Fruit profiles seem to mellow and get better with a little age, but wheats are made to be consumed in short periods of time. I think I seen a write up in BYO or Zym with a timescale around 1-3 wks (Green) 4-8 wks (prime) 8-^ (deteriorating).
I notice with the Peach CA the peach profile gets better as the keg goes down and usually the best pint is the last. I tried to put a little age on one batch by brewing a couple batches at once and assumed since I had more than one keg it would last a little longer and I could age it a little. Boy was I wrong haha 10 gallons of beer went just as fast as the 5. Cheers!
