Well, are you eastern or western? Out east, higher volume starts closer to 300 or 350cfs. Out here, I'd tend to agree with Gary, folks seem to think you need a lot more before it gets to be high volume. In fact, I think of creeks as always steep and always low-volume. If it's steep and high volume, to me that's hair!
I think a whole lot depends on the nature of the streambed. 225cfs is a great number for the Green, but it's bone-dry for some of the runs out here. Gotta consider the river you're on. There is stuff in Cali that I've seen video of friends running that would make your skin crawl - super steep, continuous and loads of water, like the Upper Poudre Narrows for a few continuous miles, by the look of it.
I recall an instructor at NOC saying in 1999 that "we easterners" think we run all this steep stuff - and we do. But we run it with 200-350 cfs. She went on to say that out west, they run stuff just as steep, but with 1500cfs.
Personally, I prefer to dodge rocks and boof rather than tango with monster holes; I like the technical stuff, so I love southeastern creeking. Colorado seems to have plenty of both in any good snow year, though, so you're covered either way.
FWIW