I still don't know if smashing the start and decaying in these is any better than trying to isopower it.
I've thought about this quite a bit and I don't know either! First thought is that it should be like a TT, steady power is fastest. But I think it depends on the context. And it often seems that those who get towards the front early on tend to stay there.
On pbp you have to smash it from the start. I screwed it up completely last time by trying to hold back and ride to power. I put it down to drafting but maybe there's more to it.
On indypac Kristof came screaming past me at high /unsustainable speed (I later learned he had deliberately set off last). Mike responded, screaming past me almost a fast a couple of minutes later. I got the idea it was a planned move by kristof and Mike felt he had to respond as he couldn't afford to give him a gap. But maybe he would have been better to have let him go and ridden his own race? Sarah played it differently, probably she didn't have the speed to chase. She went steady at the start. I rode close to her for an hour or so (ie until the first hill) and it didn't cost her.
But I also think of @skinny in 2015 and, Stephane last year, they both dug very deep to get to the front and held on for most of the race.