Yes, of course. If something is really interesting to the ADHDer, he or she can completely forget every thing else and enter in hyperfocus mode [1].
When one is diagnosed, and aware of this hyperfocus thing, one can use it very efficiently. I, for one, use it to work, with the help of an app called Focus@will, where I can set a timer, and play very loud music, so my brain is focused on the task at hand.