...whether these tools would work for you or not, and what your expectations of them are.

These two tools are mainly used with people you know. They work in certain types of cases and with certain types of people more than others. We can debate, which one is better, but the bottom line is that you want them to work if you're looking for a job - right? And if you do want them (either of them) to be worth your time and effort, look at HOW these tools work, WHEN they work, and WHO has success with them.

Here are my top assumptions on when social networking tools can be successful for job seekers specifically:

1. With extroverts more than introverts.

2. With those that are entrepreneurial (not necessarily business owners).

3. With those that have a strong brand identity.

4. With those that can type/text - you laugh, but it's true!

5. Those that are ACTIVE and PROFESSIONAL with them.

6. Certain young people may get more out of other networking sites (i.e. like Brazen Careerist - at least that is how and why PT claims that it was built - hear her podcast on this site).

Hopefully some Harvard brains are at work on developing studies to produce reliable data that reports on when these tools are at their best; who should bother using them and who would be wasting their time.