I did something similar when I saw your reply, but I didn't post anything because there wasn't much to say. It seems like the market has corrected itself, but perhaps now that we have a larger sample size (because there are more games lined this low), maybe now we can see certain stadiums, umpires or pitchers that are more likely to deserve such a low total. (We could have done this before, but it is more likely to be statistically significant now.)
I didn't draw any conclusions right away from looking. (The market is rather efficient after all for a sport this widely followed.) But that site is a great resource, and hopefully something will jump out at someone. Anyone betting bases that doesn't have that site (or a similar one) bookmarked may be doing himself a disservice.