SERP how long it take ?

Some of my sites are only two week old.But showing some good SERP.So how long it take SERP to appear ?

 

Some time immediately and some time a week or two, depends on your site content and incoming links and how well you attract spiders.

 

and on the quality of other sites too

 

Uncertain...can't come to conclusion for sure.

 

It depends a lot on how well you have optimised before the first spider, i have noticed that you optimise your site (onpage) before completely uploading and getting the first hit of the spider, they tend to rank well in the first few weeks, then drop for next few weeks and then they start consolidating-so you can expect a drop in traffic and then a surge which is permanent

 

its tooken me 2 years to get on the 2nd page for the search terms "Graffiti Pictures"

 

That really depends on the number and quality of backlinks.
I launched a fresh niche site on 3rd of january, and on 8th I was already in top-20 in G, and improving with every day.

 

It depends how much competition there is for your keywords.

I have been indexed in less than 24 hours and sometimes even faster than that.

If you choose a niche with little competition you should rank quite quickly.

 

it really depends on how much competition you have for your chosen keyword.

I made an experiment the other day, made one page Blog "Seo Poem", got indexed in Google in less than an hour and the next day it's no.1 for the keyword seo poem. The reason, no competition.