Not suprised that MS does this, however the sad part is for a simple search, there are literally thosaunds of bytes exchanged
For people on capped connections, this is a nightmare. 4kB/search, for using your computer normally! Even though 100 searches/day is only 12MB of data/month, the fact that Microsoft thinks it's okay for the OS to slurp data like this boggles my mind.
For example, even in the Australian market (very low competition environment), 12MB of data via 4G is trivial.