@DMF... I wasn't comparing TT frames to tri frames, which essentially are the same thing except for maybe a less aggressive setup for Tri. I was responding to Tapeworm's question as to what the handling differences are between a tt and a road bike, since he said his tt bike handles the same as any other bike. Granted, some tt bikes of old really aren't that different from their road bike counterparts, but that's not the case today, at least for the most part. And in fairness I do not know what the geometry of his Isacc tt bike is.
When I saw your post, I thought... hmmm... so I did compare the geometries of three brands that I know have representative examples of state of the art tt bikes, and road bikes but that was before I came back and realized you were talking about tt vs tri. In any case, I used Trek (Speed concept vs Emonda); Specialized (Shiv vs Tarmac) and Cervelo (P5 vs R3). All show geometry differences consistent with my post above.
I believe I mentioned tt bikes and road bikes in previous above, and I do lump "tri" bikes into the same category as tt bikes when it comes to geometry, so I think we are on the same page there.