Who cares, most artists make their tracks at the same tempo anyway... Why encumber yourself, just facilitates mixing. I understand what you mean and I do not encourage prepitching and this kind of stuff, but DJing is more than playing two tracks at the same tempo, anyone can do that.
Secondly: MILLA you are 100% full of shit I don't pre pitch all the tunes I play. Not that I have to justify myself one iota, however 90% of the tunes I play are written at 174/175 1 bpm = a very small pitch variation of a pitch fader (if you are a dj you would understand this already.) I hope this news ensures my return to the super beat matching wonderland of high morals and self righteousness that fanship and patronage.
Thirdly: Could I recommend a lifestyle that involves less time studying other people's work practices and deciding whether they are doing their job up to your standards, and more time concentrating on things that make you happy.