When a client sends you a 60-page security questionnaire, the deal is at risk before you have opened the document. Treat it as paperwork and you will lose to whoever answered faster. Treat it as a sales filter and you can use the speed to win.
Certain question categories consistently expose MSPs who have the practices but not the documentation: incident response timelines, supply chain controls, and access review frequencies. These are fixable with the right preparation.
Clients who send questionnaires with 48-hour turnarounds are often testing your operational readiness as much as your answers. A fast, structured response is itself a signal of maturity.