You may have found your browser eating out your CPU power, specially if you have multiple tabs open and they happen to be running ads. Flash ads are notorious for taking over your CPU for themselves.
So it is best to follow those guidelines when you are designing websites and templates. Usually people tend to run on blogs such as mine on blogger and the other popular platform, Wordpress. So there are multitude of designers and developers for both the platforms catering to the needs of users.
Remember, if your website gives a bad experience to users, it does not matter how good your site is, people tend to run away from your site and find alternatives. So even if you have crammed your site with ads, you might never reach the dream, making money on the internet!.
So be careful in the design of your website. Follow the IAB guidelines as they have done their homework on Internet Advertising or Online Advertising as many calls it.
As I mentioned, I am alway on the lookout for good, no! best templates for blogs and one site I usually visit is Fresh 01. They make some very best templates for the blogger all over the world.
Even if you have been to the site, browsed through the templates and even installed one, you may have not noticed that they als run a good blog, always with good advise and help on upgrading Wordpress etc.
What Fresh 01 also did was to create a advertisement size template for the Internet advertisements. Which I have posted above (after reversing the colors). You can also download a PSD, photoshop version of the file at frest 01.
IAB Interactive Advertising Burea,
Fresh 01 Blog Article.