I don't masquerade as an ATP at Delta Virtual, but I have had to use speed brakes on descent in the B722. Even with a proper descent profile and proper planning, that bird doesn't like to slow down as fast as say a B734 or B738. I rarely, if ever, have to use them on those two.
Even at an idle descent they are sometimes needed to make a speed restriction crossing.
I hope my post is not out of place.
Michael