I don't think I would have included this in the summary of that study:
"Although some established scientific laboratories say their results differ from ours, we have received multiple communications from school children who have done science projects that have reached essentially the same conclusions that we did. "
Bamboo might be even better.
http://www.cooksillustrated.com/equipment/overview.asp?docid=11874
Natural antimicrobial and easy to cut on.
I still like my thin Ikea plastic cutting boards for garlic,ramps, onions, herbs and things that stain. Just chop and fold the cutting board, pour it in the pan and toss it in the dishwasher. They come out clean and fresh.