Dan McKinley, an engineer at etsy, has an awesome blog post titled Whom the Gods Would Destroy, They First Give Real-time Analytics.  He makes a lot of great points about when to use, and when not to use, analytics.  This is the single most important sentence in the whole post:

It’s important to divorce the concepts of operational metrics and product analytics. Confusing how we do things with how we decide which things to do is a fatal mistake.

I’ve now got this bookmarked for the next time this comes up in conversation, which I anticipate will be within the next week, and quite possibly today.