I'd doubt it if he was claiming that for his first time through, but IIRC it's not too difficult to beat Super Metroid in under 2 hours if you know where to go. If one is serious about clear time, I think 1:15 is quite achievable. As for the first two, I've never timed myself on the first one and never much played the second, but I'd be surprised if they couldn't be cleared with similar swiftness.