Google is a compelling argument, no doubt, but if the biz dudes are open to switching from a "traditional" language/framework such as Java/J2EE or .Net, there are other "established" players that use Ruby.

Please don't take this as defending Ruby, the best tool for the job should win out. If the team proposing Python is well-versed in Python, that's what they should go with. But saying that Python is a better bet than Ruby, because Google embraces it is a bit of a strawman.