I tend to completely ferment by my firstout in primary before moving my beer to 'secondary'. I ferment in primary for 14-21 days almost always. I crash cool the primary for the final 5-7 days of that total primary time. Then I rack to keg.
I think most people can agree that a secondary ferment is not a ferment, its just another conditioning step in the process.
Minus the cooling step, people who put beer in kegs out of primary (myself included), or probrewers using a bright tank are doing the same thing as "using a secondary"; putting fermented beer in another container to sit for a while.
So while many of us say we don't secondary, we all do somewhat the same post primary conditioning step but using a second vessel to condition the beer or clear the beer. Its just that in the case of keggers we can serve out of the same vessle.
(In reality, I have an extra corny keg that I have trimmed the dip tube off about 3 inches. I use that keg as my "bright beer tank". Then use a jumper set up to push the beeer to a serving keg after that)