Yeah I noticed that in Memphis but was shocked at how small it is. And I admitted Louisville is only borderline, but probably deserves a mention regardless.
I'm not too sure what you mean by Montgomery County Texas though.
The one near the center is the only one Obama actually carried, it's a Hispanic majority precinct in Conroe. The other is 36.6% Hispanic VAP and gave Obama 43.5%.
IIRC the one in "downtown Conroe" (if you can call it that) also has a few Blacks... and McCain's percentage was right about half his second weakest showing.
Given what I'd impute about likelihood to vote at all, and likelihood to vote Republican, among Montgomery Hispanics... Obama probably won the white vote in that Conroe precinct. If I remember correctly. Big if. I noticed that 9 months ago.