Was offered the text option while on the 1K line on hold today. Decided to give it a try. Not good. First had to navigate a relentless series of menus trying to weed me out. (The reason I was on hold on the 1K line was that I had a request I was unable to complete using the website.) Once the text system decided I *could* text with a human, there was a very long delay (10+ minutes) before the agent came along. From that point, it was straight-forward, but I got the feeling that the agent was over-tasked with several conversations, given the long delays between each text.
So, in summary, I like the concept of this option, but there needs to be a much quicker and responsive interface so that the end result doesn't take significantly longer than a call. Obviously YMMV, so congrats to the people who were able to quickly handle their needs via Premier Chat.