I used to race. ON a bike that fit me well. I varied my stem height depending on the race, the time of year and my fitness. Winter it came up, coming slowly down over the summer. Slammed for criteriums. Up for 100 mile races. On my custom bikes, it is usually somewhere in between.
To me, slammed as a matter of course tells me the bike fit is "just barely" there.
I'm going to ride Cycle Oregon fixed with probably 1-2 cms showing and sweet, sweet fit.
Ben