My experience with the WP's, Zokes, and Ohlins forks was that, out of the three, the WP's took the most maintenance. The Ohlins dont' take much - as long as they are kept clean, leave them dirty and you'll pay.
All the Zokes seemed to be bullet proof no matter how you treated them.
The WP's seemed to be drooling all the time. I think the seals dry out quickly on the WP's and start to leak. We tried several differnent brands of seals and they were all leakers on the WP's.