Squarespace CEO Anthony Casalena, talking with First Round Review about developing a high quality product:

We tend to see a lot of deadlines as arbitrary and meaningless. At their worst, they compromise design quality and burn people out so much that they stop having good, creative ideas. Sprinting is not our core differentiator.

Ahh, product life :)

But seriously: Remember that not all successful companies sprint. Develop products how you want to, and reflect on whether it's going well.