Anytime someone puts words like "all" in a statement it isn't realistic. My experience has been extremely limited to only three women and this is what they thought about my size ( 6.5" long and a slender 4.5" in girth):
My first was my now ex. Would she have enjoyed bigger? Yes. While happy with the length she commented how I could "be a little thicker". I definitely felt loose inside her. I think her previous husband had a very thick one based on conversations.
The second was a threesome I had with a couple. Her partner had a dick about the same girth as me but a good inch shorter. She loved sucking and stroking my cock, slapped herself in the face with it as he videotaped the whole thing. We had a good time. I got together with him the following week to watch the tape. When the part came with her slapping her face with my stiff cock he commented, "She was really into your cock!" Would she have enjoyed it if it was even bigger? Don't know... but she enjoyed bigger than his that day!
The third, and my current girlfriend, keeps telling me how she loves my cock. She has had bigger, mainly in girth. Her ex was very thick but shorter and she has had about 15 partners in her past. She calls mine "the perfect fit"... "long and lean!" she says adoringly.
She says she doesn't like the idea of a big cock at all. She does have a very snug vagina, just two of my slender fingers inside her and some clit rubbing gives her massive orgasms. If I try more she winces and will tell me to back off..."too much!", she will say. So for her, bigger than average is not desired, yet she says I am big to her. She says I am the longest and thinks I am longer than average. At 6.5 I guess I am above average in length, but with my thin girth, the volume of my cock is on the lower average. So I do not consider anything about my cock as being "above average".
So "all women" do not like bigger than average. And some women do not desire cock at all, remember that!