You point is analogous to the idea of sales and marketing in start-up culture. Essentially how do you prove that this multimillion dollar deal was the result of

You point is analogous to the idea of sales and marketing in start-up culture. Essentially how do you prove that this multimillion dollar deal was the result of the person being "fresh" rather than the product itself etc. As far as I know if you're being flown out as a sales rep already, you have to be an utter asshole for the customer to change his mind. The product/engineering teams are the ones that actually have to impress them. In all honesty when a company through a rep wine and dines a client, the rep wine and dines themselves.