Are people still finding MaplePrimes slow? There are times when the server gets overloaded and things slow down a bit, but it's been my experience that things have sped up dramatically since the server was upgraded last month and that, on average, the site is much faster than it used to be. Granted, I normally access the site from inside our network, but I still notice the difference. I'd be interested in hearing your recent experiences about site speed.
As for the file deletions, the "marking as private" feature essentially works as a deletion. Once marked as private, no one else can access the documents except the submitter. So for all intents and purposes, they are removed in much the same way that the Windows recycle bin handles deleted files (i.e., they are still present, but pointers have been removed and status has been changed). Also note that the number of files that we are currently storing is not significant and in no way impacts site performance.
What seems to be missing is a feature to delete a file permanently, which I agree could be useful in order to keep your list of files as clean as possible. As many of you know, we are currently working on the new version of Primes (I'll be posting an update about this soon), and we will look at how we are storing files for everyone.
In the meantime, if there is a file that you would like permanently deleted, please send me a note and I will make sure that is taken care of for you.