~BCX~
1 in 8 node operators are currently running a BitcoinXT node, and that number has grown at an almost 8000% rate in the last week, so it's goin to keep rising.
It's also obviously necessary to support larger blocks eventually, so most people who are educated about BitcoinXT agree that it's a necessary change, and are either switching or showing support for larger blocks in general.
So yes, a lot of people have switched and a lot more people will. Whether people like it or not, larger blocks will be supported eventually, either buy XT or Core.