The best reasons to rack the beer off of the yeast are 1. Its all done fermenting and cleaning up fermentation byproducts; 2. To prevent the yeast from dying of old age and leaking their inards into the beer. Number 1 can happen in 7 days, but number 2 won't normally happen for a couple of months or more. There are other reasons, but these two apply to every beer.
Thanks for all of the responses. I was following instructions on using a secondary fermentation so that the yeast will finish off the beer and clean up any byproducts from the fermentation. My main concern was that after 6 days, there was still a thin layer on top of the beer (or is it still wort?)
My original first batch early this year didn't go so well, the 5 gallon boil pot wouldn't work on a flat electric stove, I used a solution too strong of sanitizer (1 ounce of Saniclean to 1 gallon of water) since I was using Mark's II Kegwasher to sanitize, and it was fermenting in a basement too cool for an Ale (~56 degrees).
To rectify my problems from the above, I bought a Blichmann burner for outside, Starsan to sanitize, waited for warmer weather and brought the carboy in the kitchen, where fermentation is now a steady 68 degrees.
I can wait for the finished product but it really has me twitching for the finished product, since this all originally started in January/February
![Embarrassed :-[](http://www.homebrewersassociation.org/forum/Smileys/default/embarrassed.gif)