If there is a filter it is not like the Google filter refered to as the sandbox. Like I said my site ranked in Yahoo in about 2 months. While Google took about 9 months.
Interesting - for my site - which is in a very competitive space - it tookover a year for it to start showing up in anything meaningful for Google SERPS. The interesting thing I also noticed was that Yahoo seemed to follow suit with Google about 2 months after the site started showing up in the Google SERPS. Here is a parallel experience. I do organic SEO for very large clients. One of my client has 30,000 affiliates and huge traffic including huge revenue. They were doing some things that got one of their URL's banned 0 which I was able to reinstate once idenitfied the problem. I had about 60 keyphrases I wanted to optimize for high placement in the SERPS. Once posted, it only tool Google about 3 days for them to start showing in their SERPS. They are now all in the top 25 - some 1 and 2. I can only speculate with the experience with my small site with relatively small traffic compared to a very large trafficed site how the serach engines view them. The moral of my story is: The Internet is becoming a big business world, when a site with big traffic does something, the search engines take notice. All us little guys have to wait for the left overs until we become big!
some guys say yahoo delay biz site for long time, so that they pay pay 300$ .but delaying new sites is not good.
I agree, I have seen from experience a lot of link building ways work with yahoo and msn but not with google. But if the links are really not spammy then google will give credit to it sooner or later.