Sandbox Theory

Sandbox theory is a new idea thats shooting around the SEO forums. Basicly its come up to explain why new sites take so long to get listed in Google searches. Its saying that new sites and new links take a while to kinda sift through all the other sites, to find its relevancy. I've notices in dealing with searhes sush as traffic reports that MSN will pich up a search quicker than Google will, so I've even seen the evidence first hand. In such cases I've seen google pick similiar results just a few months later.