It’a a shame that old threads can’t be retrieved as this was asked a few months back! I have genuine DT QR’s and had concerns, a lot of folk felt that they were not up to the job and advised replacing them.
I then realised that the problem was the way that I tightened them, ie the lever needs to be held whilst you turn the nut until it’s tight. Then turn the lever so it should then be super-tight. But I have had the odd occasion when I can’t get it undone and resorted to using pliers!
In fact perhaps what I should do is check them mid-ride so see if they need tightening because I’m sure they sometimes they seen slightly looser at the end of a ride. But I definitely don’t do gnarly rides so can understand your concern.
Hope this makes sense but am not sure if it answers your question!