I'm not sure what "count" means in that context. It's real software you can run, and it's really running on OS X and Linux. So it does what it advertises.

But yes: this is basically advertisement. Google released a big piece of notable windows software with an open source license, and Codeweavers took the opportunity to show how you could get that source base running on other platforms in a matter of days using their product.

I'm not rushing off to download it, but still: this is a good hack, and a great piece of marketing IMHO.