Having experience of using local and outsourced programmers:
Never EVER believe the following from a programmer:
1. Examples of work* (unless on the site of someone you know and they’ve been openly using it for at least 3-6 months)
2. Testimonials (unless from someone you know - see 1 above)
3. Reviews (unless from someone you know - see 1 above)
4. Sites they’ve developed (see 1 above)
5. Certification of ownership/rights (coders can disappear overnight when they are found out)
6. Statistics (PR can be forged, traffic can easily be diverted, forum posts/comments/testimonials can be forged)
My experiences: