Absolutely. The longer the hair, the more it will tend to tangle. But the interesting thing is that the higher quality human hair wigs such as the ones made from European Human Hair or Russian Human Hair will tangle only the first few months of wear and then the wig breaks into your skin, so to speak, and the tangling gets much better.
The winter weather is also hard on wigs. Coats cause a lot of knotting and the heat can cause static.
To brush out knots, work on the inner layers first, from the tips to the roots. Use detangling spray if necessary.