"After crunching the numbers, we found a consistent rate of JavaScript-disabled requests hovering around 1% of the actual visitor traffic, with the highest rate being roughly 2 percent in the United States...
The second takeaway is that JavaScript-disabled users exist. While 2% of U.S. visitors may not seem like a lot, keep in mind that over 300 million users visit the Yahoo! homepage each month. That means 6 million users visit each month without the benefit of JavaScript...While the percentage of visitors with JavaScript disabled seems like a low number, keep in mind that small percentages of big numbers are also big numbers. "
http://developer.yahoo.com/blogs/ydn/posts/2010/10/how-many-...
"After crunching the numbers, we found a consistent rate of JavaScript-disabled requests hovering around 1% of the actual visitor traffic, with the highest rate being roughly 2 percent in the United States...
The second takeaway is that JavaScript-disabled users exist. While 2% of U.S. visitors may not seem like a lot, keep in mind that over 300 million users visit the Yahoo! homepage each month. That means 6 million users visit each month without the benefit of JavaScript...While the percentage of visitors with JavaScript disabled seems like a low number, keep in mind that small percentages of big numbers are also big numbers. "
And a follow-up post:
http://developer.yahoo.com/blogs/ydn/posts/2010/10/followup-...