Nooo! Detonation itself is caused by a lean condition. Fuel needs oxygen to burn; if you have too much oxygen and not enough fuel to 'cool' the combustion, temps are going to get high. For obv reason oxygen (air) is a lot more prone to igniting than fuel, hence the reason a lean condition would yield to detonation.

Has your tech pulled the spark plugs? What do they look like? On what basis do you know that it's detonating? If you are indeed detonating, it would have to be caused by some kind of electrical/electronic error, as the DME wouldn't allow it under normal circumstances. Substitute another DME and recheck. Keep in mind that prolonged detonation always means broken parts...expensive ones. Typically, the head will go first, but the piston(s) will follow suit as well. It may not be a bad idea to just go ahead and pull the head at this point, if the tech is positive about the detonation. He should also be able to get the knock sensor input values from the DME. I hope you get the oil analysis done as well...

SANguru just had a detonation problem in his M5. It was caused by a shorted-out DME. His cylinder heads did have to get replaced.