Numerals over Text

I recently came across this link to another good article...this is a short article outlining the theory of using numerals over text on webpages... I had often wondered which was the best practice... mainly because in the past I have been 'pinged' by tutors for using numerals 182 over text...in say an essay...so now I know the opposite is true for webpages. Apparently, "...numerals often stop the wandering eye and attract fixations, even when they're embedded within a mass of words that users otherwise ignore."
http://www.useit.com/alertbox/writing-numbers.html