If you notice many top players including Efren, Bustamante, Strickland, Pagulayan use a long bridge. Some use a long bridge and a long stroke, some have a short stroke. I prefer a longer bridge and a shorter stroke, like Pagulayan.
Mine is 11" from the cue ball to the loop of my bridge finger. My stroke, however, only takes the cue back 4" - 6", sometimes less, depending on the stroke.
I like the long bridge for it's aiming view, but the short stroke for accuracy. I also like the long bridge in case I need to reach back for a little more stroke.
I will warn that although I think the long bridge is better to sight with, it can be less accurate if the player is taking a too-long stroke with it. The best players can take a long stroke accurately but most of us can't.
Chris