I have seen deer duck, but I think we also use that as an excuse...My bow is 15 years old or so, I shoot aluminum arrows, they don't duck unless they are on alert...I bet my bow is slower than 80% of the guys on here...I have killed 3 with this setup this year....

I bet it's your form, no, you don't have to bend at the waist, but you have to have a good rear anchor...Get your nose on the string, use a peep...Only shoot at relaxed deer...Sometimes a head net can change that rear anchor...You really need to get up in the tree with your hunting clothes on and shoot from a stand...I have tried it from my house and it's just not the same...

btw...I'm not going to tell you how I know this is true........
Been there......