FORTUNE — Piper Jaffray’s Gene Munster has been analyzing Twitter comments and polling a group of more than 800 consumers to try to gauge demand for Apple’s (AAPL) iPhone 5. On Thursday he released his latest findings:
- As summarized by the chart above, interest in buying an iPhone 5 in the next three months jumped from 47.7% to 54.9% after it was introduced and has remained above 53% even as the launch craze faded and the Maps app emerged as an issue.
- Interest in Google (GOOG) Android phones fell in September (to 35.2% from 39%) but has since remained steady.
- Interest in Microsoft’s (MSFT) Windows Phone (currently at 6.5%) and Research in Motion’s (RIMM) BlackBerry (4.9%) trail far behind.
The chart below compares buying trends of the iPhone 5 with the iPhone 4S in the 2.5 months after launch based on an analysis of Tweets that contain the keyword “iPhone” and such purchase-related keywords as “bought,” “shipped,” “purchased,” etc. According to Munster, it shows the iPhone 5’s “demand index” up 30-40% year over year.
The Twitter chart: