No one I know thinks the Caltrain baby bullet is actually fast in terms of overall speed. Especially when compared to say a Shinkansen, TGV, or ICE train. But the marketing seems to have worked so well, some on the peninsula are asking, why do we need high speed rail if we've already got the Baby Bullet. The HSR Compatability Blog answers that question in full detail. The short answer, there is a reason it's only a baby.