It's too small to consider in any typical reduction in stem length. Let's take the OP's 110mm stem and reduce it all the way down to 80mm, and assume fairly narrow bars - 40cm or 200mm per side. If you draw a straight line from the stem bolt towhere the rider is gripping the bars that is the turning radius, which determines how far you have to move the bars to achieve a given angle.

Assuming the rider is gripping the bars about 50mm forward of the straight portion of the bars:
The original turning radius is 269 mm
The reduced turning radius is 256 mm
The difference in achieving a ten degree turn of the bars is 2.2mm, or less than a 5% increase in "twitchiness." I very much doubt most riders would notice that difference.