It will not hurt it to give it some revs, just don't keep the revs in one spot for too long! The new thinking on "breaking in" is to treat it as normal, if you baby it, the rings will not be forced against the bore properly and will create uneven wear in allowing compression forces into the crank case, and oil the other way, leading to higher oil consumption.
That's how i "break 'em in" so far no problems!