TDD cycle length

In theory, a Test Driven Development cycle constists of the following steps:

• Write a new failing test
• Run the test and see it fail
  
• Code (in order to pass the test)
• Run the test again and see it pass
• Refactor
  

In literature the time for one TDD cycle is stated to be about a couple of minutes.

I was wondering how my personal cycle time is at an average. So I wrote a little plug-in for Eclipse that listens to test runs and computes the average time between a test run with failures and a test run without any failures.

Here is what the very simple plug-in looks like:













In case you want to give it a try you can download it here.
The plug-in contributes a view called TddMeter. In order to show it simply hit <CTRL>-<3> and type TddMeter.

Note: The plug-in requires Eclipse 3.3

Update: The plug-in now persists its state.