As they say, "proof is in the pudding".
Someone is going to have to stress test an application with Unigui on a webserver to see how many connections it can support and how much CPU and memory is needed for each connection. There is an excellent stress test software called StresStimulus Web Load Testing that works with Fiddler (both are free). They will show you in real time the memory and pageviews/sec etc. using only local machines. This is a "must do" BEFORE releasing a webserver into the wild.
Mike