I'm guessing it's the low hard and wide chine that causes that Walt. They say that about the GBs too and the same applies.
When I bought Willy I assumed I'd need to put some nice fat spray rails on her but most of the time I can run in 3' seas w/o getting the windshield wet. My slow speed undoubtably helps too but the bow eases the water aside instead of smashing it aside. Also Willy's short length allows the stern to drop so the bow can rise quickly to the sea pushing less water aside and pushing it less violently. But the seas rise up to the top of the stem in amazingly mild conditions. But still w very little wet on the windshield.
Look at this picture and see that the bow wave is gently rolling outward instead of being spit out by more speed, a wide bow and a hard chine. These two pics were taken at Willy's top speed or very close to it.
North Western Washington State USA