Not familiar with this doctor and haven't thought of it quite as a debate but I've certainly read a lot about the possibility of misdiagnosis. I would say it's more of a problem with lesser trained doctor who might not be familiar with this as a potential mimicker but most of the time, they try to rule it out. That said, like MS, in some cases this can be pretty tricky to diagnosis as well. Don't be scared though! Ask your doctor if he/she's considered this and what tests were performed to rule it out.
On the other hand, note that the above is coming from someone who does in fact suspect that there
are probably other ailments misdiagnosed as MS a lot of the time, or more accurately, that MS may present itself because of other underlying problems that make our immune system go haywire, at least so in some cases. Also that there are thousands of people walking around with this condition who will NEVER know they have it.