For a site named 'readability', the font they're using seems awfully thin and spidery. I need to selecting the text to comfortably read it, and my eyesight isn'

For a site named 'readability', the font they're using seems awfully thin and spidery. I need to selecting the text to comfortably read it, and my eyesight isn't bad. Is it just me, or are anti-aliased web fonts these days harder to read than their normal equivalents?