Fair point, but still, that's only Yahoo websites, and (to nit-pick) I, for one, don't Yahoo!
Another thing to take into consideration regarding this sort of stats is the user base. I _think_ a lot of the NoJS (or the likes) users are of the tech-savvy bunch and more likely to use sites like this one. So, I _think_ a more relevant percentage of people that have JS disabled is higher in this case.
How are text browsers (lynx, elinks) counted in the statistic? Strictly speaking, javascript isn't disabled because its not supported in the first place
Another thing to take into consideration regarding this sort of stats is the user base. I _think_ a lot of the NoJS (or the likes) users are of the tech-savvy bunch and more likely to use sites like this one. So, I _think_ a more relevant percentage of people that have JS disabled is higher in this case.