I've only been doing SW for 6 weeks or so and I find it hard to use all my syns and frequently have less than 5. I have a big appetite and am certainly not skimping, I just find it happens. Today I've had 5.5, but there are days when I get up to 12 or so.
It's interesting to read the perspectives on here. In group, someone said you should have all your syns because if for whatever reason your weight loss slows down, you have an extra tool in that you *could* reduce your syns and see if it helps, whereas if you are already running at close to nil then you don't have that wiggle room.