So... why not just turn swap off completely? I have done it a few times accidentally and once intentionally (when I was encrypting my HD). That would get the exact same result that they are getting.
Even with a lot of system RAM, this is kinda risky. I think a better approach would be to create a logical volume group--primary volume being the RAM drive, secondary an actual disk partition--and mount it as swap. That way you get the best of both worlds: ultra-fast swap space that spills over to disk if necessary.
I don't mean to sound smug, but I recommend they try Solaris, which seems to have excellent performance when dealing with large amounts of RAM (greater than 8GB) and also has excellent multithread performance.
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