Wheel spokes & strength
Fewer spokes doesn't necessarily mean a weaker wheel, there are many many variables to consider. Ideally you have a salesman you can trust, or these wheels are online ( link? ) and there are reviews to read. It also depends what you're using these wheels for, of course, a casual road ride isn't likely to do any harm.

At any rate, if you're stuck with the wheels on the bike, you should just use them until they give you trouble as DRH mentioned.

http://sheldonbrown.com/wheelbuild.html#spokes

What are the advantages or disadvantages of different spoke styles