Haha well you might be right, but I'd have to try it to believe it. Haven't had the opportunity to try a Diesel, like I said I'm fairly new to kayaking. The main reason it's taken me this long to get into kayaking is because while I have dozens of kayaking friends, their boats never fit me and I like to try things before I buy gear. In my experience, people of average height really have no concept of exactly how outsized 6'6" is. I am taller than 99% of the people on the planet, and you really just have to live it to understand what a challenge it presents in terms of gear, clothing, vehicles or anything else that is sized for normal human beings.
I also fear that you are right. Luckily for me, there are some companies catering to us bigger folks. (One of the reasons I appreciate Jackson as a company)