As it turns out, most of the work that most developers do is updating or enhancing CRUD apps. There's already a plan and an intent that just needs to be typed out.

I've found 15-30 minutes to be plenty of time to review about a day's worth of code. It's enough time to process what the code is doing and iterate over the tests, in general.

Here's a scary thought: if something small takes 15-30 minutes to appropriately process ... how much longer do *large* changes take? Can someone keep all that in their mind that whole time to comprehend and process a huge change?

And a better question, will they?