Ruben crying that Mayweather ''ran like a chicken'' proves to me who won the mental games going into this fight. His reactions suggest that Guerrero didn't enter the fight prepared for a Mayweather that would box him on the back foot which, coupled with his failure to prepare for Mayweather's right hand, resulted in him getting completely schooled.
The contrast is true for Mayweather. The verbal altercations before the fight seemed to have a minimal effect on him, I considered him entering the ring with the intention of humiliating or hurting Guerrero but he went out there and did his job. To me that shows a level of focus as there were points in the match up, if his mind was set on humiliating Guerrero, where he could have show boated or put his foot on the pedal.
If Guerrero went into this thinking Mayweather was going to stand in front of him and trade, just based off smack talk, then he's a colossal idiot. Though I guess carrying four guns into New York state proved that already.