To clarify,I never claimed "rolling" was a proper substitute for the "cleared for takeoff" call.If there is any delay between receiving(and the read back of)takeoff clearance and spool-up(ie.receiving that clearance whilst still taxiing),I believe the "rolling" call is a genuinely legitimate second call.It is also IMHO acceptable as a primary read-back if cleared for an immediate,as it underlines your acknowledgment of the fact that TOWER wants you to go NOW.
Of course there are short-cuts in aviation speak,and as the skies get busier,the shortcuts will become even more common.Shortcuts dont make the skies any less safer...You need only work out of ORD to know that.But this approach only works where both the pilot and controller are equally familiar with all the nuances of the English language.It is dangerous if this pre-requisite is not there.
Literal word-for-word pedantic read-backs are unnecessary and in very busy TMA's are quite frankly not a help.BA,which flies to the US more than any other UK airline,perhaps has learnt this...and maybe this is why it was a BA crew that was involved in this instance.
Re the Tenerife..that accident was caused by the KLM Captain and the KLM Captain alone.KLM tried to point the finger at the Spanish and even the Pan Am crew,but the tapes put paid to that.