On my eldercarecafe.net site, I made a determined effort in March to post every day that month. Then during April and May I went through some kind of funk for various reasons.
I posted 8 times in April and 13 in May before getting back on track in June. My page rank plummeted per the early June stats. The early July stats show the site on a strong upswing once again.
Yes, content is king and SEO is extremely important, also.