you're fine. This question has been asked before (though the wording was different which may account for why you were unable to find it in the search)

http://www.reddit.com/r/AskHistorians/comments/2pq5fa/the_imitation_game_ends_with_the_quote_historians/

from the top comment

his is from a lecture he gave at Cambridge in 1993 (emphasis mine):

Now the question remains how much did it shorten the war, leaving aside the contribution made to the campaigns in the Far East on which the necessary work hasn't been done yet. My own conclusion is that it shortened the war by not less that two years and probably by four years — that is the war in the Atlantic, the Mediterranean and Europe.

Hinsley's argument, in the broad strokes, is that Ultra intelligence was decisive in turning the tide of the Mediterranean and North African campaigns in 1941-43; that a more drawn-out campaign in North Africa would have delayed the invasion of France beyond 1944;

This shows the "broad strokes" of your answer essentially it avoided a longer term stalemate that would have pushed back d day.

but essentially all such claims are vulnerable to the fundamental problem of counter factual history (which IIRC Hinsley acknowledges in other places).