Park factor based on runs is nearly useless. You can have the 94 Braves pitching half their games in Minute Maid Park versus the 2003 Tigers pitching in Dodger Stadium with no accounting for the wild variance in pitching quality, only that the 94 Braves gave up 300 less runs in Minute Maid than the Tigers did in Dodger Stadium. Therefore, Minute Maid Park is a pitching haven.
The Twins pitching staff was awful last season. The Phillies pitching staff, while not overpowering, was still quite good. Both teams had similarly mediocre offenses. You don't think that huge disparity in pitching had something to do with the park factor and runs scored in each ballpark?
Did you catch this part...that I posted twice: ' Take this for what it's worth...probably nothing...' I was just giving some info...this particular one is fairly new to me, so I haven't really given it too much of a look. People can do with it what they will. Like most stats, if it backs their opinion, it's helpful to them. If not, it's worthless and can be torn apart.