Hi Nats,
Bottom line, if your company's 50% workforce says neutral—> they're bored!! They lack motivation and hence no satisfaction. Remember Herzberg's 2-factor theory??? On the other hand, rationally speaking, neutral may mean dissatisfaction due to any reason: pay, work culture, peers and superiors' behavior, or plain old family problems. Neutral may also mean satisfaction because if the person is content and considers showing it on the poll, they may hesitate as they might not want their superiors to know they are satisfied, fearing extra work or time they may have to bear.
But again...remember the bottom line...the employees are bored, and you've got to do something to liven things up and raise the satisfaction level.
Chow,
Junaid