Cool weather, shingles will take 2-3 weeks to lay down properly?

where do you live ? if the day time temp is at least 65 to 75 it should not take any 2 to 3 weeks for shingle to seal down some times the least costly bid is not the best deal! I roofed for over 15 years and that sound like a lot of bull to me get some other bids throw out the hiogh and low and go with the middle and dont give any money up front it is a sure way to get screwed with out the kiss