I'd bet this originated from MS Research, who have plenty of people who have worked on/invented actor systems predating Erlang.
Besides, Microsoft employs Simon Peyton-Jones, among others, and they fund serious programming language research in various ways. I'm not implying it's dishonest on their part, I just found it a bit odd.
I just think it's worth reinforcing that there are interesting actor systems other than Erlang, and that some of the people at MSR deserve some credit in the area.
http://news.cnet.com/8301-13505_3-10235400-16.html
at a YC meetup i talked with a few of the powersearch guys and they seemed like pretty big fans of f# at the time.
http://research.microsoft.com/en-us/um/cambridge/projects/fs...