How google treats subdomains?

Hi
I had a website and changed the domain name. it took 3 months until google cualculated everything and started to rank the new domain.
Now I redirected a domain to subdomain. Do you think I also need to wait 3 -4 months for that? Some keywords started to appear..but not every keywords that was ranked before redirection.
I'm not sure if redirecting to a subdomain is the same thing as redirecting to a completely new domain in the google eyes. I was thinking that subdomains are a little more…
How google treats subdomains?

See original post by MediaLink