Thanks to all for their advice and concern, here are some statistics I
found interesting:
www.ambysoft.com/surveys/agileMarch2007.html

Some findings include:

1. 69% of respondents indicated that their organizations are doing one or
more agile projects. Of those that hadn't yet started, 24% believed their
organizations would do so within the next year.
2. 44% indicated a 90%+ success rate at agile projects, 33% indicated between
75 and 90%. It appears that agile seems to be working out.
3. Co-located agile projects  are more successful on average than
non-co-located, which in turn are more successful than projects involving
offshoring.
4. 98.6% of agile teams worked adopted iterations, and 83% had iteration
lengths between 1 and 4 weeks.
5. Smaller teams had higher success rates than larger teams.
6. 85% of organizations doing agile had more than one project completed, so
it's gone beyond the pilot project stage in most organizations.