Thanks for the infos deerkill10 and rlh24.
I have "tweaked" the registry according the the TCP Optimizer settings thread, although I had to use Dr. TCP on one of the machines as Optimizer refused to recognize the network card (yeah, weird). Standard http rendering appears to be adequate as, of course, it uses the DW6000's proxy. However, https drags - and my friend must use several https sites in her line of work. And AOL... well, that's another "story" altogether. Sometimes it works just fine, at other times it doesn't work at all. I have no idea, yet, what the problem is with AOL.
I'm going to try a test local installation of the DeleGate proxy. I'm a novice with DeleGate also, but I do know that it DOES cache https so it theoretically should allow for quicker access to those secure sites. I'll report back here my results - success or failure - in case any are interested. May take a few days.
Does anyone have any info on the DW DNS servers? Does a list exist here?
Again, thanks!