He makes some great arguments. Especially for the solopreneur (like me), making maximum use of time and energy available to me during the day is critical. There is risk in spending time on A/B testing, with the results of much work put towards this coming back "Inconclusive".

I could see extreme cases where you need to test a major area of the business, testing an entire market segment, etc...but then you could argue just pick up the damn phone and call people in that market segment.