How much does google analytics under-report things?


I was just comparing the built in page view stats tools in google's blogger software and the stats in google analytics. The former is server side, but they do prune access from spam site (I think), the latter is relies on interactions with the client, cookies, etc. so in the toy way I understand teh interweb, I see this as 'client' side. It's really simple to configure things so that google analytics doesn't track access, and quite a few people do.

So here's an interesting number - from July 1st 2011 to today, there were 184,035 page views (~710 per day) for this blog in google bloggers stats for chembl.blogspot.com, and only 55,435 page views in google analytics (~214 per day) - don't laugh at how small the numbers are, but now you know. Anyway, google analytics is about 3.3 fold down on actual page views.

I'm sure all bloggers look at their stats, so is this ratio typical?