In my experience Surface 3 performs better than Surface 2 across the board. One thing I have noticed recently was an occasionally momentary lag on Surface 2 (figured they were just telling us it was time to upgrade) but the same has happened on Surface 3. D'oh! Must be a Windows glitch.
Thanks everyone. I upgraded to S3 and loving it. No bugs so far with Exchange email. Also I did see some reports of charging issues. I tried charging with my Samsung phone charger... works great. I also like the bigger screen and above all full windows version.....using all my programs that I use on my laptop.