I never heard this... But it kind of makes sense. If people from far uptime, like Daniels, could transport themselves to other times, why would Future Guy have such trouble merely communicating with the past? The only reasonable explanation is that his tech was vastly inferior -- perhaps due to its being created (or stolen and not completely understood) in a time as early as the late 22nd century.
I think it was Berman who said that about Archer being Future Guy when pressed on the topic. I think that was a lame idea and had it been a Romulan that would have been the better idea. Hell he even looked Romulan in his shape.