ECU Reset Works!

So, I take my truck into the same locksmith to get my wife's key programmed to match the other two keys (see http://www.titantalk.com/forums/titan-general-discussion/62474-titan-would-not-start.html). The younger locksmith charges me $50 to program the three keys (it was $45 to cut a new key and program two - he says the machine charges them every time they use it). I drive home and see that my "Check Engine Soon" light is on. I am beginning to fear a trip to the $dealership$ when I remember and use the search function on Titantalk.
The locksmith did a long series of inserting, turning on, and removing all three keys, intermittently starting the engine to test. I think it gave the ECU some instructions.
I decide to reset my ECU using the instructions at http://www.titantalk.com/forums/tit...t-throttle-accelerator-position-learning.html and used the "Easy Method". It worked the first time. The light went out. And... eureka! The startup problem discussed at http://www.titantalk.com/forums/titan-engine-transmission-drivetrain/64502-start-up-problem.html also went away.
I do not know if it is real or pschological, but... it also seems to run smoother and I looked better in the mirror this morning when I woke up!