How fast is your boat? Do you know? Does the question even make sense? Isn't any boat going to go faster if you apply more power to making it move? What people really should ask is" "how efficient is your boat?"
The details section at the bottom of the kayak design pages uses some symbols to help you find the boat that is appropriate for you. Each boat is rated in various categories so you can quickly pick out the general characteristics of the boat at a glance.
One of the most important aspects of kayaking comfortably and easily is your paddle. An efficient kayak is of no use if the paddle you use is inefficient, or if you use your otherwise efficient paddle in an inefficient manner.
A description of boat design terms and how they relate to boat performance.