Tumblr, on its iOS app store description:
We’re so thrilled to tell you that our app is now completely native! Get ready for a faster, smoother, and more responsive Tumblr Dashboard.
So, another major social app follows Facebook in abandoning an HTML wrapper app and going full native. The message seems clear: if speed matters, go native.
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#newsrw - Social Media Optimisation Paid Members Public
Liveblog of a panel debate about social media from news:rewired in February 2012