Hi, stigler! 
When you get the chance, you should introduce yourself!! 
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We don’t know if EVERYONE can. But yes, it certainly must be possible.
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I… don’t quite understand this question.
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Not quite… It is quite difficult sometimes to control dreams, but as with any skill, the more you practice, the better you get!
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No one can tell you that either… It differs for everyone!
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Or would it go slower? Usually, the dream time goes faster (I think…). However, there are reports of people in which the dream time seemed to run slower than IWL…
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Motivation. It is perhaps the biggest key to lucidity!
And a DJ always helps. Good luck with your Quest for Lucidity (no pun intended)!!