I know my "keeper rate" is not as high as a great DSLr. The main reason I take the sports pictures is to post 2-3 shots on Facebook per game...and the HX30 delivers quite well.
From a technical perspective, The quality of photos is in-line with the quality of light. Near magic hour with the sun behind me, the HX is near amazing when it can stay at ISO 100-200.
I suppose a SI photographer would complain that I don't quite freeze all action enough, as a ball or foot or hand may have a some motion blur (often self inflicted while I try to keep ISO lower)
With Indoor basketball, I am stuck with Sports mode and its ISO 1600. It's not superb detail, but still quite recognizable.
Since im not big into publically posting pictures of DS, here's a picture I took at a college game from up in the cheap seats: