Nancimadsen, Hello.
I went through the seotoaster website and could not find anywhere that seotoaster guarentees a 99% good seo performance. Nevertheless this is a good question. How can you measure the SEO performance of a content management system? and what would be a performance of 75% for example?
To your questions, I will answer that the seotoaster team is 100% devoted to producing a quality, really easy to use E-commerce content management system that automatically takes care of - most of - search engines requirements for a comprehensive indexing of a website's pages.
The "most of" might be the 99% you are mentioning.
Here is the list of SEO features seotoaster brings out of the box:
http://www.seotoaster.com/seo-website-design.html
Now, if you hook-up your toaster or pool of toasters onto the seosamba remote administration platform, - most of - your 'on-site' SEO, web and social marketing efforts, news publishing, will be centralized and automated.