The actual story behind the spacing is that the guy who did the first layout of the board accidently got the spacing off a little
Yea I've read about that "accident" too. I don't buy it. It's a lame reason. And the spacing is off more than just a little. Those guys are pretty smart and I don't care how many they made on the first run, it should have been changed right away. You don't just let an error stay in a design when it is a core problem with the physical format. They should have been more forward thinking if
it was just an accident originally, and I tend to lean toward the suspicion that they left it there for some other reason rather than "oh well. too late now".
I declare "shenanigans" !