Forming a committee is often used to create the perception of taking action
without actually doing so. Given the church's record so far, I see no
reason to believe to otherwise in this instance.
The claim that the "U.S. stacandal erupted in Boston in 2002" is just
plain false. There were lots of prosecutions and suits long before that. There
were lots of incidents that came into the public eye. Not quite on the 2002 and
beyond level, but 2002 was not the start of anything.
Most bishops who actively covered up for those accused of abuse have retired if
not died. The heart of the abuse crisis was the 1970s. Many of the accused were
not accused until after their death.