Nokia announced the Xpress browser as being able to compress traffic 90%. OK, AFAIK they didn't explicitly say that this also applies to SSL, but they also didn't deny it.

I personally wasn't surprised they compress HTTPS traffic. After all, most ("useful") websites (except of course TMO) use SSL by default, or allow you to choose that as default (google, facebook, etc.)

In fact, if they didn't compress SSL-encrypted traffic, most "non-educated" users would (have) complain(ed) that they're not getting the claimed advantages when using this browser.