Have you ever had a call with a prospect that dumped so much on your plate that you hung up wondering what the heck he/she talked about?  Have you ever wished you could just sit there and converse with the prospect?  I am not particularly good at listening while taking notes, and I believe that while I am taking notes, my face betrays my thoughts.  I recommend you and your salespeople record all sales calls (a recommendation for new hires anyway), and not just on the phone.  Recording calls allows your people not to have to worry about the facts.  They don’t get bogged down with trying to make sure they’ve got every little detail.  They can sit and enjoy the conversation and focus on listening and hone in on the essense of the call.  And if they need facts, they can then replay the tape and get the facts.  In fact, I believe they should be recording their calls and replaying them with you anyways as this will help them become better at their sales skills.