[manigandham]

This is actually the reason why CloudFlare has better analytics. Their system is more advanced than a regular reverse proxy and they can tell what requests are actually pageviews based on the HTML loaded.

Client-side stuff is unreliable and is open to everything from javascript blockers to network connections in the middle. CloudFlare even had a post about how their tracking was better (cant find it now).

EDIT: Yes I know newer ajax sites are completely different and there's probably no perfectly accurate way to track them unless the devs setup analytics properly, and even then its up to the same issues all client-side tracking faces.