Is January part of the "slow season"?

My father runs a business, is in the yellow pages, has a website, is listed on Dex, etc. yet he isn't getting any calls. The Yellow pages that he is in is fairly new (January 2008), but it was being distributed right before Thanksgiving. He got one call in December and the woman never returned his call back to her. Since then, not one. Not one question, no comparing prices, nothing. Are we being impatient? Is January part of the slow season for a tile repair/restoration business?