While I'm shifting from 6th to 3rd, I simply floor the throttle. By the time I get into 3rd and let off the clutch, the engine is either at the right RPM or slightly higher. If I genuinely need to accelerate out of a bad situation, it's a pretty good rev match.
If I want to put on a show I'll wait an extra beat to let the clutch out. Nothing opens eyes on would-be challengers like watching a car peel out on dry pavement going 55mph! I usually warn my wife if she's in the car by saying, "Slingshot... engage."
2012 GT Premium Coupe 6MT
Kona Blue | Black/Grabber Blue
401A | 3.55 | BBP | CP | SP | EP | GR | HID | RVC | RSS | "Piss 5ohwhoa off"