In my original post, referred to by Flattop1, I only discussed torque wrenches as that was what the question addressed. To expand on what mannyfunnies said above, while a torque wrench will deliver 32-33% fastener preload variation around the bolt circle on the best day of your life, with an experienced technician, for the reasons discussed in that post, angular turn is much more precise. Our standard (we developed a relatively simple computer program to calculate torque based on fastener and clamped materials, thread lube and resulting friction coefficient), we had no set value for initial baseline "snug". We found that initial snug was fine when established at 10% of what the calculated joint torque should be, then the required angular turn was applied (the program also calculated angular turn, which was convenient), in 3 increments, as with the torque wrench. Resulting fastener preload variation around the bolt circle was on the order of 15%, instead of 32% and up. If one has the means to calculate the required angular turn, or can get it from another source, angular turn is a more precise system for establishing fastener preload than use of a torque wrench.