What’s up with the Meta Tag Analyzers on SEO sites?

My tags are good, at least they follow all the tutorial guidelines from www.w3schools.com. Yet these sites can’t find them is it a gimic to get people to doubt they know how to do meta, so these search engine optimization sites can get paid. Or are my tags only good when looked through by some search engines, but not others.

http://www.widexl.com/remote/search-engines/metatag-analyzer.html

http://www.submitexpress.com/analyzer/

http://www.theemiratesnetwork.com/computers/webmaster/analyzer.htm

are just a few I’ve tried.
www.metatagmd.com

http://www.seomasters.com/

Didn’t even give me an analysis

Related Blogs

• The Side Kick : SRC 13: Marlon Sandro vs Masanori Kanehara booked …
• IMG Signs Sorana Cirstea | Tennis Delight – News on Your Favourite …
• IPL: Income Tax raids on MSM, WSG, IMG |Tax Guru
• On Adobe, Flash CS5 and iPhone Applications at Mike Chambers
• safari supports pdf in img tag « Angus Thinks…
• IMG Models
• The Title Tag And Meta Description As The SEO « Hope is not Lost …
• EcoLight LED Table Lamp by IMG Lighting – Black Desk Light …
• Arcade Repair Tips – Adjusting The Horizontal Width Coil
• Connexion: 2 Columns Right Sidebar Fixed Width Free Wordpress …
• Never mind the quality, feel the width. Size matters. « Black and …
• Sandra Rose – Celeb Style: Beyonce
• HTMLGIANT / meta-blah
• where can one get best margin on a stock trading account and what …
• Set Linux Terminal Console Column Width | The Linux Daily
• What page width is in fashion for contemporary web design right …
• How To Write Title And Description Meta Tags « TagFocus.com
• keywords usage in the meta tags « TagFocus.com
• Search Engine Marketing – Meta Tags « SearchMat.com
• Soovle: Have Fun with Your Keywords | Search Engine Journal