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To be honest, CM5 is a bigger achievement for BGS than SI achieved with FM 2005. Of course (according to my estimations) FM 2005 only had ~8 months development, of which probably no more than 4 with the full team, before release, and CM5 had well over a year.
No. CM4 was, so it has been 3 years for SI. They did know where they were going with CM4, though (and still managed a lousy release version, in which Eidos' role isn't completely clear), BGS had to completely make up how to get CM5 'right'.