I consider the paddle shifter or sequential shifter a semi-automatic because the driver isn't actually pushing a clutch pedal and moving the gears in the transmission himself. Sure they're telling the car what gear to go into, but there's no "manual" action required besides bumping a paddle.
That said, having the ability to shift on command, yet still be an "automatic" is the perfect transmission. No one can manually shift faster than an auto transmission. They can be programed to shift at a specific rpm. They're extremely consistant. For any type of racing, these are very valuable points for a transmission. As long as you can command the gear to get into when you need to if that is required, of course.
For anyone saying manual transmission are faster for drag racing, do a search for cars running under a 10 second 1/4 mile time and count the manual transmissions you find. I'd guess it's maybe a 1 to 10 ratio. A properly built auto transmission will be faster than a manual 99% of the time, no matter what power level. The thing is, most stock vehicles have REALLY slow shifting automatic transmissions, NOTHING like an auto racing transmission. It would be stupid driving around on the street with a racing auto transmission and you'd get even worse gas mileage.
All that praise to the automatics and I have two cars with manual trannys.