Yes, I've fished Purdy. It's one of my favorite winter searun spots. I vary my retrieves from very slow to very fast as well as herky-jerky and smooth and steady until I find what works for the day. The tidal movement putting a belly in the dryline is also a determining factor in the speed of my strip. A fast moving tide only needs a couple twitches every so often with the line hand.
See you at Purdy sometime,