With this I agree. While I think the point of "Windows Phone does things faster" is true for some sets of "faster", "faster" needs to be clearly defined as "not taking up your time" as opposed to actually running faster. "At a glance" might be the correct phrasing, the live tiles show you the information you need without needing to open the app.

That being said, I was merely replying to the OP's assertion that knowing the weather in two places at once isn't a good use case. It's no different than having clocks for two timezones.