Well, according to this Guardian article, the experiment was pretty convincing:

A man who was left completely blind by a series of strokes has delighted scientists by negotiating a maze of obstacles without using his cane.

The man, known only as TN, walked around chairs and boxes without knocking into them in an extraordinary demonstration of “blindsight”, a strange ability some blind people have to detect objects they cannot see.

I shall reserve judgment for now because whenever I pass on a report on a scientific experiment from a national newspaper it seems that someone who follows science journals more closely than I do comes back with a story about how the experiment was full of holes, or the journalist completely misrepresented the results, but it is interesting.