Incorrect.
QUAERITUR: A Baptist going up for a blessing during Communion time
"According to the Church’s liturgical laws, Communion time is for Communion. Doing something other than what the liturgical rites prescribe during Mass is not permitted. The Communion portion of Mass is governed by the rubrics, rules, just like every other part of Mass. Priests and others have no authority to change those rubrics on their own. They shouldn’t be giving blessings during Communion time. This is, nevertheless a wide-spread practice. In my opinion, all those people going up for a blessing, with good will and in good faith, are not doing anything wrong. I and others think (correctly) that the practice should be ended and people should be given the whys and wherefores. Ending it should be accompanied by lot of instruction and it should be ended through a careful and kind process."
I didn’t say the priest SHOULD bless someone. I said he can. He is the only one who can. A lay person can’t bless anyone.
By the way, here is a rejoinder to Fr. Z: http://newtheologicalmovement.blogspot.com/2012/04/whats-wrong-with-blessing-children-in.html
I do liturgical training for my diocese and we are working hard to get the laity to realize they can’t bless anyone. Priests blessing people is another issue entirely.