This was brought up again in the 1313 thread so I'm going to ask everyone instead of veering that thread off course. Every time I hear someone talk about the Force they point to Yoda lifting the X-Wing from the swamp and insist it was hard for him to do so. Is it because he sighs after doing it? I never once thought it tired him out; he sighed because Luke didn't understand. Remember the whole "size matters not" thing? According to what Yoda says lifting the X-Wing is no different than lifting a pebble. So that view contradicts what Yoda says.
Now I'm not saying that you could pull a Star Destroyer out of orbit, but a starfighter isn't that big.