Is the Marathon/Half-marathon market over-cooked?

Today ethicalrunner tweeted the following:
Wexford half marathon have cut their entry fee…the half / marathon market is getting over cooked – interesting to see who survives…..
So, we followed by tweeting this to get more reaction:
See tweet from ethical runner re half-marathon market over-cooked. Yes or no? Let us know. We will print views. http://bit.ly/drqPBF
And here [...]