Yeah, I was more trying to understand if it was a one-time issue with the phone's GPS as a whole, or if it was really still a problem specific to the Watch's estimate (while the GPS itself was accurate).
I plan on running tomorrow morning and I'll report my findings as well (I'm still using RunKeeper alongside Workout for the social aspect).
So I went on the same run as prior to 1.0.1, and sadly my Workout app is off by as much as before. Prior to 1.0.1, my 5.97-mile run turned into a 5.84-mile run in Workout. After 1.0.1, I added a little .04 detour to make it 6.01 miles. Workout indicates 5.88 miles.
I did find that instant pace, however, appeared accurate.
I wonder if it will take a few more runs to recalibrate the incorrect estimates, or if we should un-pair and re-pair our Watches to restart the calibration process. I'm weary of taking my iPhone out of my belt pouch lest it throw off my calibration even more, but people have mentioned that having the iPhone vertical in your pocket instead of horizontal has helped correct their distance estimates…