According to the results of the latest ChangeWave survey, consumer demand for the iPad has risen since the device’s launch. According to the company’s May survey of 3,174 consumers, 7% of respondents said they were very likely to buy the iPad, while another 13% said they were somewhat likely. These numbers compare favorably to February’s pre-launch survey, which found 4% of respondents very likely to purchase and 9% somewhat likely…