Maybe if you use Mod_Perl and a lot of hardware it could work for you, but I was never able to find a straight PERL script that could handle multiple campaigns, regions, detailed reporting, etc, and not burn down its own dedication server.
You may very well be right, but my experience has not been good with PERL and big traffic (think of UBB). PHP has been a lot better for us, but because it is/was relatively new, finding a fully realized PHP application is/was not as easy as it is with older languages.
Good luck!
