Completely agree. I created a site that is a vine web viewer for shared vines on twitter. To date I've collected over 86 million shared vines and the majority of those are in the last month. It took the entire month of February to reach 1 million vines, today it ranges between 1-3 million a day. The introduction of the Android app really accelerated the growth and I suspect a slight lull will come up as the newness wears off.

IMHO, I think that is because no one uses the Vine app to consume vine content, so they must post to twitter to share their videos. However, with Instagram, I open up that app specifically to look at photos that people I follow in Instagram have shared.

My Instagram social network is largely independent of the other large ones (twitter, FB, G+) with only a slight overlap, so it definitely deserves its own consumption, and would also explain the reason that the vine shares are more prevalent on twitter than instagram shares.

Don't forget that Instagram wanted to achieve this goal by no longer permitting Twitter to display their images, only a link to their images.

Citation?