I was reading this and got a chuckle at work. Then I looked up Molina's battery mates.
Pettitte 7
Burnett 12
Sabathia 10
Chamberlain 5
Hughes 2
Mitre 5
Gaudin 2
Just look at that for a second before you continue your idiocy. You figure the #1-5 starters would get one turn every 5 days. That means, that you should expect 20% of all your starts to be with each pitcher. Well, there is a disproportionate amount of good pitchers in his overall catching numbers. 22 of his 43 games were started by our top 2, that's over half. Then you need to consider that those numbers would be skewed in the other direction for Posada, meaning that he has less than 20% with Sabathia and less than 20% with Burnett. So, if you catch better pitchers at a greater frequency, your CERA will be lower. Also, you also dont see CMW on this list anywhere, a guy who absolutely blew up
the ERA radar with his 3 starts in April. AND, Molina only caught one game from Joba after he started getting tinkered with.
That being said, there is a large enough sample size from Molina to make a conclusion on both Burnett and Sabathia. The CERA from Burnett would show that he does better with Molina than Posada. And after watching Burnett essentially throw Posada under the bus in Boston, I think that is warranted. While the CERA with Sabathia is actually less with Posada than it is with Molina, it is significantly more with Burnett.
So, overall, your point is flawed when trying to compare catchers on the whole as per usual. But isolated to Burnett, your point is correct