I just experienced this on CX 883 last night. It really sucked. The remote stand (actually a remote mini-terminal, with enclosed jetway) was all the way at the far west end of 24L, so quite a long drive. Then a very long wait to actually board. Then the aircraft has to taxi back the full length of the runway for take-off.
CX was pretty apologetic and blamed airport construction. I assume they're being forced to do it by LAX. SQ was also using a remote stand, I'm sure they're not happy about it either.