To clarify, we used it for our system status updates and notifications at one of my last places of employment (small university, ~3500 userbase). We didn't have

To clarify, we used it for our system status updates and notifications at one of my last places of employment (small university, ~3500 userbase). We didn't have a lot of official followers, but our SMS subscribers, as reported by the various departments and persons of interest across the campus, was sufficient enough to ensure we had a strong and reliable network for notifications. During all our checks, we never had anyone complains they didn't get the notification via the normal Twitter update or SMS. Per your link, the opening paragraph seems to summarize that it's "possible", but there really hasn't been evidence. I would frankly assume the same for all services. In our use-case with the notification, we wanted a redundant system along side our System Status Dashboard (which supported RSS) in order to allow people to check in case the Dashboard was inaccessible. (e.g., consider a scenario where campus intranet goes down and different buildings cannot get an outgoing connection past their switch - redundant update from Twitter allows for this) Plus, quite frankly, most of our target audience wouldn't bother with RSS :p I know and you know it's easy, but we needed to get people who had little to no technical education quickly connected. It was a lot easier to tell them "text 40404 follow [account]" than to set up the rest.