Talk to your agent - photos are very easy to change in a listing - and they really do matter. Wise of you to care - have your agent freshen them up with an eye towards quality and quantity. To drive home the point that photos draw attention, Realtor.com offers a "search by photo count" function - that tells you that it matters.
Good luck to you,
Unwavering Commitment to Service
Call your Agent and ask them to take some new pictures. They shouldn't have a problem doing that. I take seasonal pictures of my homes so I keep the photos fresh in the MLS. With homes taking a long time to sell I find it helps to keep the pictures moving, that way the listing doesn't get stale.