Possibly depending upon when you talked to Speer, that isn't necessarily true. Several years back I bought a box of 125. gr .357 Gold Dots and the "hollow point" was a dish rather than what one expects. Outstanding performance at Magnum velocities. IIRC, pretty much nothing at .38 Spl velocities.
I was speaking with them about three years ago, and about loaded ammo, not component bullets. Actually, the topic had to do with their .44 Spl load out of a 2.75" Model 69.