This could absolutely be a performance problem on my network, either temporarily or not, but I never had any issues connecting directly to my server from work using the Cocoa client. Haven't used the prism reflector since my trial expired.
Now with I7 today, trying the reflector from work gets a very slow connection to the server (meaning it takes a while to bring up the windows) and timeouts trying to load plugins, so on my remote display, all the plugins show as not loaded--even for things like Z-wave!
So I wonder if the reflector now uses more bandwidth than it used to. For reference, my home DSL is 11Mbps down/.08Mbps up. Yeah, terrible.