Before this thread gets locked (since it is off-topic for Community), I'll just say that I will never ride the stupid DFW TRAAIN again after having missed my flight a couple years ago due to a breakdown. Besides - it really isn't that hard to walk (or run like hell) between the gates - it just takes a few minutes.
The new train (isn't there one being built?) might be worth a shot, until its reliability screws me.