Thanks for everyone's feedback! It is appreciated. I went ahead and updated my iPad 2 to 7.0.4 and JB. So far it seems to be fine performance-wise. Opening links from Twitter and other apps still seems to be very sluggish, but that may be a hardware issue? clicking a weblink from Twitter, sometimes I have to close the window and re-open to get the link to "take". Other than that, I like the format of iOs 7 very much on the iPad.
I waited as long as i could to update my ipad 2, actually from ios 5.1 straight to 7.06.
Since i own an 3rd gen ipod updated to ios 5 that became almost unusable, I was decided not to update my ipad 2.
I just did because some apps wouldn't run any longer on ios 5.
Surprisingly, it does seem it became faster and according to the ipad usage counter, battery is lasting for almost 20 hours (in use), with full charge.
I don't even know if that is correct, but it does seem that battery lasts longer than with ios 5.1.
I have no regrets from the upgrade, actually I like it in all aspects better than the previous ios.