I would think the real question is whether he thinks he is going to the course every day with equipment that is superior to everything else.
That's taking it a step further, for sure.
When tiger was playing as an amatuer....he utilized MP14 and MP29 Mizuno irons. When he signed with Titleist.....the blade they made for him was......an MP14 with a Titleist stamp on it. Through R&D they developed a new line.....just so he wouldn't be thinking about this.
Through R&D....Nike did the same thing. they made their new irons to Tiger's EXACT specs and wants. I can assure you he thinks he's going to the course every day with SUPERIOR equipment. If he didn't....he'd use something else (like he did a few years ag when he was frustrated with Nike's Drivers and went back to his Titleist Driver).
He was endorsing Nike....but using something (driver) he felt was SUPERIOR.
He is not going to go into a gunfight with a knife ......just because he's endorsing knives.