I have both out on my stall and the wooden ones are used more frequently than the plastic ones. So when the last plastic have gone I'll be all wood..... The customer is always right......and being an atypical Yorkshire-man I stopped cutting them in half as I was contaminating them by extra handling.
As Fatshark points out you can't easily sample cut comb with the plastic stirrer's and I find lining them all up the right way round to put into my sample pot is a faff.