Ah! This is a good one!
I did a little bit of digging on the subject before responding. So this is what I gather.
Generally, if you work out in a fasted state, your body secretes more Human Growth Hormone than it usually does, which would lead to increased strength gains. However aside from the additional boost in HGH, I would say no other major factors aid development of strength any different than usual.
The rest would depend very much on your diet. Whether you are eating in a caloric surplus and how much protein you are consuming, and the types of foods itself you are consuming.
RE: I Quit Eating for 28 Days [Water Fast] : Day 14 (Focus)