Sadly it does not surprise me as it could be up to a week between forum posts over the past few weeks. I think with the promise of a upgrade people started to develop a wait and see approach, I know I did. As the new site took longer to arrive people lost heart and stopped bothering. I guess we will soon see whether that will reverse. So far it is looking good with a lot of people coming back who have been off the site some time now and more forum posts started in one day then the past six months!
It has only bee a few hours since the relaunch so lets see what happens