We have had a discussion on this topic some time ago. Members were talking about the improvement of the out-of-the-box installation...
https://openacs.org/forums/message-view?message_id=22628
Therefore you are right that this is still a problem of OpenACS.
Another thing that always interested me and that was brought up by Jon is: What are the pros/cons of PHP/Tcl...
I don't want to start a flame here, just interested in some true arguments that I can use for Tcl and against PHP...