Perl CGI for commercial web sites?

Hello SuSE folkz, Some one asked me a question about using Perl CGI for moderate and heavily loaded commercial web sites. Could somebody enlighten me if Perl CGI can handle a tough load. I think that production CGI environment should be written entirely in C/C++ but I can be mistaken. Are there any commercial web sites which use Perl CGI for their web applications? Thank you in advance for any information. Alex