> Internet Explorer 10 for Windows Phone 8 uses the same rendering engine as the desktop build of Internet Explorer 10, which is certainly capable of loading and running Google Maps. This argument makes no sense. Google Maps desktop works on IE10, but Google Maps mobile is clearly a totally different site. I think people are jumping to conclusions here.
>a totally different site. Did you really just type that?
Mobile: http://www.webpagetest.org/result/130105_QH_4GR/1/details/
IE10: http://www.webpagetest.org/result/130105_WY_4H7/1/details/
It's the same /URI/, not the same code behind the scenes. What you seem to be suggesting is analogous to saying that because two businesses share the same physical building, they're the same business (think skyscrapers).
EDIT: While I don't work for Google, I bet it's not even the same team that works on the mobile maps site vs. the desktop maps site.