Depends on the industry, I guess.
Nothing changed for two of my sites, except for contitnual steady growth of traffic (started just after the site was launched).
I guess it is partly due to the nature of my site. I'm actually surprised how well I was doing for an unfinished site. It only had 10 articles or so, while I plan on having over a hundred once I finish.
Almost all that traffic is comming from one affiliate with which I exchanged reciprocal links.