I've been surfing Jersey for 20 years. and to classify east coast (or i'll say Jersey since your name let's me know your from there) as mushy, short period just isn't accurate. granted, most days it is that. but i don't consider that "surf". if you want to talk about a board for someone on summer break from school that will let them surf every day, sure, say short period and mushy. but that's not real surf, and i would never give someone advice to buy a board that works when its ankle high and on-shore.
but if you know where to go when the swells hit, you will find plenty of rideable walls. and while i am by no means an advanced surfer, i'm usually riding my HPSB, as i can usually find a peak with some push on most days. and no, i'm not some 120 pound grom. i'm in my thirties and pushing 200.
that's why when i design my quiver, i start with a longboard for the mushy days, a groveler that can handle size for small waves with punch, a HPSB, and a step up or two. if its truly mushy, even the best groveler sucks and i'd prefer to log it.
let me clarify something. do not mean that on most days I can find a rideable, powerful peak. I mean when there is some type of system creating waves, you can find a nice, rideable wall. Basically, when we get a swell, there are good waves to be ridden.
to say jersey/east coast is mushy isn't fair, cause when we get swells, it gets damn good.
when the waves are good, then i'm on my trusty hpsb. but that's not likely to happen over the next few months. a stubby hpsb like the neckbeard fills that void w/out resorting to logging.
I dont know about your abilities but the local pros are killin it on a disco http://vimeo.com/39243508