Jolt, the short and shallow bars help with reach (shorter) to the levers and shallow relates to the shape of the curve. If the shape is shallower, it's much easier to get your hands around the levers in the drops. Picture the letter C with less space in the middle. One thing to be aware of is that different brands of bars that are called short and shallow have different specs. I researched like crazy until I found the ones with the shortest reach and drop. Here is a link to the ones I have:
http://www.specialized.com/us/en/ftb...bend-handlebar
And here's another one:
http://www.qbike.com/product/s/Salsa...andlebar.shtml
Hope this helps.
2015 Trek Silque SSL
Specialized Oura
2011 Guru Praemio
Specialized Oura
2017 Specialized Ariel Sport