I thought this an interesting post from Jonny Bowden:
http://www.jonnybowden.com/2009/03/cut-calories-improve-memory.html
Especially because memory can be an issue for me. Also, since I’ve been buckling down on the low carbing, by appetite has gone through the floor – to the point where I find myself making myself eat.
What if there was an added benefit to a reduction in calories that gave us 20% more mental acuity?
A nice side-benefit of your diet, eh?
I was introduced to the fellow when a friend of mine showed me his 150 Healthiest Foods on Earth, which I thought, with a few exceptions (being a low carber means having to run any info through your low carb compliance filter to be sure it fits), was a great listing of good foods – and all around good advice.
My one BIG problem with the book? NO REFERENCES! Reference-checking geeks like me are left hanging!
His blog is worth checking out, if you haven’t come across him yet.
Low Carb Confidential 
Im finding the same thing. My hunger levels have plummeted since severely reducing my carbs.