#2, the highest weight will not automatically be the next to stake. It is statistically the most likely, but since hashing is involved (and a nonce), this makes it a bit more random then that. Or else small blocks would never stake. But as a rule of thumb, the bigger the weight, the quicker the stake.
Updated, thanks.
Thanks david, i did make a few small changes to the wiki, but plan on adding more to it. As should everyone else. It will really be a good place to point newcomers to.