Just had this done yesterday. After a commute, I think there is a noticeable improvement in Eco more. It seems to rev a little higher and downshift quicker, to the point where I'm not tempted to turn in off in traffic.
I say "I think" because I also had the cruise control not working issue after the x-mas tree dash recall was done and figured they would just reset the module.... well after 2 hours of troubleshooting the tech finally found the star case which says officially to, er, um, disconnect the battery for 15 minutes...
I need to buy more post it notes for my next service visit.
Anyway, that essentially erased the learning of the transmission so I'm not sure how much of the improvement is the tsb and how much is just restarting the learning process.