According to a report at The Next Web, Apple's iOS devices, including iPhones and iPads, account for at least 39 percent of the photo traffic on Twitter. Photo search engine Skylines has constructed a breakdown of the various platforms and clients that post photos to Twitter, showing that despite iOS 5's relatively young lifespan it is already the seventh-largest Twitter client.
Combining the 5 percent of photos that come directly from iOS 5 with statistics from Twitter for iPhone at 21 percent, and Instagram (an iPhone-only photo sharing app) at 13 percent, the 39 percent figure is reached. But, that does not include the percentages from other Twitter clients that are cross-platform, such as TweetDeck, Echofon, and Twitpic (which can be used when accessing many clients).
With iOS 5 still in its infancy, the sky is the limit for Twitter's long-term viability and Apple's contribution to it. The easy integration and swift adoption of Apple devices that are Twitter-ready should propel iOS's mark on Twitter's social graph and will most likely be the top photo-posting client sometime next year.
Personally, I post most of my photos to Twitter using Instagram, which also shares an enormous upside with iOS due to its iPhone-only stance and meteoric rise in popularity over the last several months. It will be interesting to see how much Instagram can hold on given Twitter's iOS 5 integration.
How do you post photos to Twitter? Let me know in the comments!