Which version of The Big Sleep have you seen? I only saw the pre-release version, and saw a few of the different scenes in the 1946 version that was released to theaters, and there's a remarkable difference in the dialogue, with the version released officially bearing the same corny reparte delivered in Double Indemnity. I must also say I'm shocked that you gave the Maltese Falcon a 100. Granted I think the film is probably one of the 20 best films of all time, and remains my favorite film noir (Citizen Kane isn't noir), but a rating of 100 from you I don't recall ever having seen.