I am having this exact issue on my iPhone 4S. I just compared the steps on my other iOS devices, and the app store does not reload.
I'm not sure it's related, but links to specific apps from other apps or the browser, do not properly load (it just launches the app store to the last state I left it).
That happens to me also. I'm really annoyed. I talked to a senior advisor and they don't know. They said it's working normal even though it's not. The funny thing is I talked to three different advisors and none of them have an iPad 3 so they don't understand what We are going through. I think it has to do with the iPad 3 and how it handles the ram with the App Store. This is the only issue I have with the iPad 3 everything else is perfect.
Scott Forstall is busy selling stock! After he's finished making millions maybe he can get back to work and fix this little problem we're having.
Love yah Scott