Until fairly recently the usual legal limit was 1.0, so no, that's not very high.
First, a 1.0 would mean your blood is 100% alcohol. I don't think people would have survived that :-)
Second, it hasn't been anything higher than .08 since the 1970s, if I recall correctly.
But more importantly, I think this is a whole lot of wringing of hands for nothing. I'm not trying to minimize DUIs by any means, but at the same time I think the fact that 3 NBA players have DUIs looks a lot worse because there aren't many NBA players (compared to the general population.) I think most police departments would be happy to ONLY have 3 DUIs a night, you know?