Changewave just published the results of a recently conducted survey about the iPad. To be more accurate, they posted a few bits of data online; the full dataset is for sale.
The survey group consisted of 3,174 US consumers, 20% of whom said that it was somewhat likely that they would buy an iPad. I wish I could compare that number with how many said that they would buy an ereader. I'm not so sure how much faith I'd put in that 20%. My guess is that at most half or more of that group won't follow through.
245 (7.7%) respondents confessed to owning an ereader. Kindle owners made up the largest chunk of that number 162 (62%). iPad owners came a distant second with 40 (16%). I'd like to know if you could give more than 1 response to this question, and what the overlap was. That would be a telling detail.
Do you want to know what I think? I'm not sure how much weight you can put in one data point, but I'm sure people are going to read all sorts of meaning into it and then take it as gospel.