I think at one time Gib Ledges was more popular, maybe even considered the standard route, but I am not sure about that. I've climbed it three times, twice in winter, once in early spring, and found it faster and more direct than the DC. Rock fall is definitely an issue, but in winter that is mitigated by the cold temperatures.
One word of warning, there are huge crevasses above Gib Rock. The prevailing wind during the winter is from the SW, which strips the snow off the mountain on the south side leaving sastrugi which effectively conceals the thinly bridged crevasses. On Gib Ledges I have always climbed ropeless from Camp Muir to the top of Gib Rock because it would be very difficult and time consuming to find reasonable anchors to belay those sections, but I insist on being roped above Gib Rock due to very serious crevasse danger.
Gib Ledges:
Top of Gib Rock: