I have some different views with one Optimizer, he is saying that
1- Ranking is depend on Page Rank 80%.
2- He is saying that SubDomain is not supported by Google.
But My Experience is different i have optimize website Without keeping mind Page Rank and many of keywords are in Top using the subdomain.
I am looking to your valuable thoughts and experiance.
I hope you will give me sharp view...
Alok Kumar Upadhyay