Yes, it may be force of habit by only one or two controllers.
We really should be cutting down on verbose R/T though, for instance again at STN we normally obtain the Clearance via DCL.....therefore in the PDC we've already given you the Callsign (XYZ 123), Stand number & ATIS letter. All we should have to say next on our initial R/T call to Delivery should be "XYZ 123 Fully ready for start & push" provided the PDC has been received and accepted in advance.