In terms of responsiveness, Siri is finally meeting my expectations after the 7.0.3 update. I've used it quite a bit the last couple of days and it has been VERY fast and quite accurate. Siri is a handy tool for me but was hobbled with frustrating delays ever since its first release, and particularly so after iOS 7 first came out. I was swearing at it way too much. Finally, now, it works as intended. Very glad to see this. I figured eventually Apple would straighten out their issues with online services, and it looks like they are getting there.