Can the original iPad keep up with today's apps?

I realize that its many months old, it was the first one, and there have been two iterations since, but I am just looking to see how it fairs with alot of apps out there today. I know it will work fine for email, twitter, and a few other lightweight apps. But im curious how it performs with apps like Paper and some of the slightly-more intensive apps. Just curious if anyone has any experience with using an original and/or has tried out a bunch of apps.

It's not getting iOS 6. That's lame but oh well.