i read in Gamblers book (great stuff btw) and from other mpua's that the opener is not actualy that important, its the transition from the opener that is.
an example would be when AFC Adam asked a woman where the nearest starbucks is
she said she didnt no but ther might be one up ahed, without a good transition there wud be no choice to stick around as you have the infomation you asked for, but he had a good transition he said somthing on the lines of
"aah are you lost too then? i always find i get lost in big cities it must be the same with you, im adam btw" then he continued
he also saw a hb txting on a phone and said "if hes more than 5 mins late, dump him"
she laughed and he said "how long have you been waiting?" she laughed and said 5 mins, he introduced himself and continued.
dont get me wrong a strong opener is great to have, mystery reccomends memorising 5 which i think sounds good, canned openers often reach the hook point but you still need to add more threads to the convosation so the transition even with a strong opener is still just as important