Thanks to Scott. W. Ambler who put out a recent survey on Agile practices. There seemed to be enough respondents so a robust set of metrics could be pulled from the survey.
A couple interesting facts here:
- Experienced teams only took a little more than a week longer to release a product than an inexperienced team.
- Regardless of experience, most teams chose an iteration length of 2 weeks.
- More experienced Agile teams gave less estimations and budgets up front (Sounds about right)