Scatter Charts: Did Moneyball Die in 2012?

We recently gained access to a new scatter chart tool that allows us to look at related statistics. During some initial research we were very surprised to find that in 2012 a team walks were not statistically related to runs scored.

2012 Team walks to runs scored

However, if you look at 2011, 2010 and 2009 you can see the significant relationship between walks and runs scored.

This prompts the question: Did Moneyball die in 2012?

The caveat being that the at the time Moneyball was written, the goal was to exploit market inefficiency, which was walks at the time.

Compare the differences

In 2012, walks were likely over-priced since more of them didn't correlate to scoring more runs, since a team potentially gives up hits up to get them.  

What are your thoughts?