Arduino Wifi Shield AdHoc

Will the https://www.sparkfun.com/products/11287 connect to an existing adhoc network? I’ve been searching all over the net and digging around in forums. I don’t want to spend the $85 to find out that this won’t work for my project. I would think just provide ip, ssid, and subnet that it should just connect and allow me to send/receive through UDP/TCP ports. Am I correct?

Thanks,

Postholes