The US didn't mention a lot of things, it is the typical damage control behavior.
Oh that makes sense. So revealing about the 2007 test defies that logic about being embarrassed that the Chinese can shoot down satellites.
Those dummy ICBMs were probably getting smashed into million of pieces by the KKV/EKV.
And I don't those extremely small debris can do much damage.
Something small going about 8000km per hour can do a lot of damage.