It sounds to me as though "Boeing's recommended airplane performance data" do not include credit for thrust reverse.
A check of the NG Flight Planning and Performance Manual (
www.myboeingfleet.com) shows normal configuration stopping charts that calculate reference stopping distance (130,000 lb) that includes credit for two thrust reversers. Adustments are then applied (as required) for one reverser only or no reverse thrust.
At my company, the manual (FOM) shows only the distances without credit for reverse thrust.