So, what would you do with DISsimilar, Chakka? I would certainly say, "The taste of Islay malts is dissimilar to that of the Speysides." 'Dis' suggests 'away', as well, so I'm not sure how that gels with your idea that 'to' just means a "coming together."
The plain fact is that, in everyday British speech, different to is frequent, despite the fact that some people consider it wrong. Consequently, in response to the actual question here, one might certainly say that that different to is perfectly correct in colloquial usage.
I still agree with Fowler as regards the logic of using different to, though - as I said in my earlier response - I myself would never say either different to OR different than!