enough light, but you are not telling us enough to say why that happened. It is no more 'normal' for a digital camera to do this than it is for a film camera to do it. A faster writing speed has nothing to do with how much light the camera is getting.
Did you have the flash on? Some cameras may snap the shutter to fast if a flash is used in a gym. The flash will not be effective in such a large place, but the camera may assume that it will be. ISO can help somewhat. The two other things which control the amount of light are aperture and shutter speed. How were these set?
I have an HP 935 Photosmart that I am having trouble with so I plan to buy a new camera. But the only complaint we had with the HP was that VB or BB (action) pictures inside a gymnasium always turn out so dark.
Some claim that is normal for a digital camera while others say a faster 'write' speed memory card will help. Now I hear that a camera with greater ISO limits would solve it.
I am shopping for a new camera.
Comments about this problem and recommendations as to a new camera that won't have the same problem would be greatly appreciated.