How true this is, and I found out firsthand as a potential prospect myself.
Last week I attended two business shows rolled into one. Walked around all day, talked to businesses and individuals, gave out my lovely card, the usual. I was even interested in some of the services. Bt I noted that their reps were so eager to sell that they just talked... AT...me. They didn't even find out about what I was dying to tell them. I couldn't get a word in edgeways. When I did manage to get a question in they talked over the end of it. It was offputting and I wanted to get away fast.
So it reminded me of how careful I need to be in speaking to my own prospects. Not a huge problem as I tend to be more a listener than a talker, but when I get enthusiastic I tend to talk more.