No, I wasn't on this forum then. I would be pretty impressed to see such predictions pan out as described. But I would also challenge how many other theories were proposed at the time? Sure, one or six start to emerge as more plausible as more people clamor to refine it.
An educated reader can make almost any theory sound plausible, even if it was not the athor's intent. Ever read the essay which demonstrates that Fight Club was about Calvin and Hobbes? Or any of the more plausible theories from the WMG (Wild Mass Guess) section of tvtropes?
Everyone invovled will remember the correct theory with vigor once it has been proven, regardless how many erroneous theories were proposed alongside. Or how many erroneous details were accidentally attached to the correct theory, though they were part of a different puzzle.
If you want an example of the evidence of guessing, you should look at the link below. To give a reference point, it is made just a little bit before the release of HoA. They have 3 or 4 preview chapters (like we're getting with Alloy of Law). And the words "shard" and "Hoid" and "cosmere" has yet to be uttered...
http://www.17thshard.com/forum/topic/439-my-idiotic-theories-a-retrospective/(Although this is for the last book in a trilogy. It's got a lot more foreshadowing going for it)
EDIT- I agree with the Radiant-sayers. I think something is going on with Dalinar. With the visions, the enhanced use of shardplate, and the super enhanced strength, I think he is most certainly on the path to becoming a Radiant. In fact, his enhanced use of shardplate when he is protecting reminds me a lot of Kaladin's more effective use of Stormlight after he says the Words of the Radiant Knights.