"I made a four" doesn't carry the pride of "I made a par" in my opinion...
I think this is only true because most golfers don't immediately know the 17th at TOC is a par 4. I think if you said it to a junkie who posts on here, the reaction would be the same. I actually think it sounds cooler to say the number, but then I'm a math geek...
I think if Phil had pulled off the 3 iron at WF it would have been miles ahead of this shot. It would have resulted almost directly in winning the US Open, which has eluded him to date, not to mention I think the actual shot at WF was tougher (but that's hard for me to judge). Heck, in many ways, for Phil, his winning putt against Ernie was a bigger shot than this one on the 13th. Birdie to win his first Masters, his first major, got the monkey off his back in style, etc.
Still say par had no relevance, he was concerned about others scores, particularly in light of the fact that at that point, the tourney was very much in doubt.