Why am I writing this?

There's a great article on Jakob Nielsen's site about using numbers when writing for web pages. Regardless of the rules of grammar, this usability expert says you need to use numerals when writing for the web, because readers scan web pages and numerals pop out. His studies show that users eyes stop at numerals when they are scanning text, because these numbers represent hard facts, such as statistics or product specifications. What's the lesson here? As usual, it's important to understand the purpose of your writing, because having a clear sense of purpose will help you write better. I also like his very succinct one sentence summary at the start of the article.