yes, you should see the scale values in the channel box. If you are not check to see if you are getting a message to the affect - non object-space scale baked onto object. In any case double click the scale tool and in the options select reset tool. This should fix the problem if you are not seeing scaling values.

Normally scaling an object and then changing its creation node parameters should work fine. The problems occur when you move or translate vertices and then try to modify parameters in the creation node.