Indeed so, David. They are the Cinderella underdogs to their much bigger cousins, the pennies.
I'm led to understand that during the 1950's and 60's, for example, there were very few really old halfpennies still in circulation, whereas a relatively high number of buns, veiled and Edward VII pennies were obviously still circulating - presumably, as you say, because of the accelerated amount of wear they sustained.