U.S. Internet traffic was up 1% last month from the previous January. Some web-based companies performed even better than that. Here is a rundown of which publicly traded Internet companies saw their unique visitor numbers rise fastest in the first month of 2013 – and how it impacted the price of these tech stocks today: Yahoo! (NASDAQ: YHOO): According to ComScore, Yahoo! traffic was up 5% from last January – same as it was in December. The good news pushed shares up 2% today, and the stock has now risen 8.3% in the last month. Amazon (NASDAQ: AMZN): The end of the holiday season did little to stop people from visiting the online shopping giant in large droves. Amazon traffic was up 5% from the previous January. Nevertheless, shares dipped 1.8% on Monday. Priceline (NASDAQ: PCLN): Traffic increased 25% year-over-year, but the stock fell 0.7% today. Shutterfly (NASDAQ: SFLY): The online photo-sharing site attracted 11% more unique visitors than it did last January – following a 10% year-to-year increase in December. But again, the big traffic gains did little for the share price – the stock was down 2.7% today. LinkedIn (NASDAQ: LNKD): The online network for professionals demonstrated impressive growth last month – especially when compared to rival Facebook (NASDAQ: FB) . LinkedIn’s traffic increased 18% in January; Facebook’s declined 11%. In this case, investors took notice – LNKD shares rose 3.3% to a new all-time high of $155.41.