Updated my 6 Plus and iPad Air last night. Immediately tested LTE, phone call, and SMS on 6 Plus. No issues whatsoever. Things *seem* snappier as well, but they were already pretty snappy anyway, so I can't be sure.
Oddly enough my local news is still reporting the 8.0.1 bug. At first I thought it was in regards to 8.0.2, but realized they are still running with out dated information. It would be nice to have them say it was resolved in a day. Or at least throw out the version number so people don't have to ask if the latest version has the problem.