It's a strawman, though. The problem isn't PHP developers per se, it seems to be a lack of awareness that dealing with money is in any different than dealing with, say, any other CRUD operation (see - Mt.Gox just casting things to floats, it's just numbers, right?.)
Just wait until people start announcing their exchanges and business written in Rails or Python, or "anything but PHP" but still turning out to have been written by webapp developers with no idea how to actually deal with currency transactions or basic security.
Just wait until people start announcing their exchanges and business written in Rails or Python, or "anything but PHP" but still turning out to have been written by webapp developers with no idea how to actually deal with currency transactions or basic security.