Time interval for Page Rank increment

As a start-up company as SEO services provider, one of our primary mission is to implement optimization strategy on our own web site. Honestly how can you convince people if you are not high up on Google SERP within your own area?

Apart from all the tactics that we can apply on site and off site, we have constantly advise people to be patient as it takes time for a web site to become popular. At the same time we are constantly monitoring our rank on the WWW, trying to estimate the time interval of page rank increment.

Our site started in June and in approximately one month, the page rank increased to 2. There is a suspicion that the increment frequency of page rank is limited to the time interval. We expect the next increment will be of shorter interval due to the snow ball effect.