My Objects all fall Unrealistically SLow with the deafult Gravity Even with Drag ZERO, what to do?

So i was first perplexed why i increase the mass and the objects continue to fall the same rate. Then i heard in the Video tutorials about physics, some guy saying that mass doesn't have to do anything with it, that it is Air DRAG. So but i have Drag at zero so then what? The default gravity is something like -9.81. But it isn't realistic. So what's a realistic number for that?