Certainly, if my wife and I were 40+- y/o we'd be riding a double, DI2, Gates belt and based on what we were doing at that age, 1/4 century ago, we'd be pretty fast. ICS provides a function that some teams find worthwhile, certainly we do. We seldom use ICS to permit one of the team to literally coast, other than for a few seconds for rear end relief. We like starting with the ICS especially on steeper pitches. Setting aside the measurables such as weight and efficiency, the only area where we feel disadvantaged is standing; we can stand, but it needs to be at a reasonably low cadence; when we try to stand at a higher cadence my wife and I can't coordinate our weight transfer and she can get out of sync. This doesn't turn out to be much of a limitation for us - just can't ride the daVinci the same way I might ride a single.