That's helpful. I've got a site with 60,000+ registered users that gets on average 61,000 page views per day from 8,000+ unique visitors. The site has custom integration using the Integration Bus and uses out of the box access and authentication. The site is using Portal development mode and is storing physical files in the file system and database.

There are about a dozen or so custom scheduled tasks that run anywhere from every minute or two to every hour in addition to the scheduled tasks Kentico has running out of the box.

The sites credit card section heavily utilizes secure web services, Kentico API calls and still have great response. Based on Google Analytics average page load time is just short of 2 seconds. We are continuing to make tweaks and updating code in the App_Code directory so I can see how this is slowing the site a bit but once those changes are finalized, I'd expect the site to be even more responsive.

Hope this helps.