I heard a rumor, or maybe it was a confirmation from a guy who builds frames in the East Bay CA.
He says he went to a Cervelo builder forum or something rather and he was told the forks weren't engineered into the frame geometry.
It was hard to swallow that pill, but I respect this guy who's been in the cycling game for years and is one of the well known builders in the nor cal scene.
Maybe the earlier Cervelo frames were designed and the earlier 3T forks were just additions to the designs. Just a random rake on what they thought would work?
The bike just wouldn't turn in at all, and then a super sharp correction from your input after overshooting the turn. My buddy who rides for Rapha explained the exact same nature of her Cervelo R3 from that same era.
I had a Cervelo R3SL for reference. There's one popular climb I do in LA (Chantry), and I recall that Cervelo being damn scary on that descent. I overshot every single turn and I'm know to be a pretty damn good descender in my circle.
Just my take on the earlier Cervelo bikes. I went to a Parlee Z4 as my next bike and it was night and day on the exact same descent. Then from a Parlee to a Speedvagen and I was 2-4 seconds from KOM of that Chantry descent before it was removed from Strava and I sat up the entire top section...
I'm sure The newer Cervelo bikes are night and day better than their frames from 2007-2009.. That's 8 years of learning and making your frames and geometry better. That's like comparing a Parlee Z4 to their newest frames. Night and Day in terms of advancement.
The Parlee I rode right after the Oversteer King Cervelo R3SL.