17 homeruns have been hit in Cincinnati this year already, and the sportswriters are quick to take notice of the "hitter-friendly" park. Most of the homeruns I've seen have been shots that would clear the fences in any park.
I realize the numbers don't lie: Last year GABP allowed the 3rd-highest HR total, I believe. I tend to subscribe to the theory that it is the result of "pitching to contact" more than it is the design of the park. Comparing the dimensions to other MLB stadiums, it really isn't that much smaller.
When hitters are smashing 420-foot bombs, the pitchers can't blame it on the ballpark.