most used server distros/setups for wordpress hosting?

Does anyone knows what server distros are used for common Wordpress hosting services (if such exists)?

I know that this question is hard to answer and I am aware that professional setups don't fall in that scope.

However, I am trying to get a list together in order to test them for their feature set but also figure out what PHP configurations and versions are used. The reason: apparently most sites/blogs seem to be hosted on pretty cheap boxes, causing endless sources of trouble in regard in plugin development....

So, if anyone of you knows a hoster and/or distribution and its setup please feel to post it here in that way: God-Daddy: | Cent-OS | PHP 5.2 | 128MB | ...anything known

I admit, I don't know any of such hosters or setups but if you know the defaults of a used distribution which, that might be already useful to build a vagrant clone of it, ie:

• Debian-6.0 | PHP5.3 | PHP-Extensions: MBString|Curl

I will update this post upon your input. Thank you!