Since the loading screen itself is a very simple animation, it can reach 240+ fps easily, resulting in lower loading times. The reason for this is because the game speed is related directly to frame rate in this engine, which means going 120fps will double effective game speed. Uncapped, it's almost impossible to read.
As OP says, when capped to 60fps, the loading screen (and its animation) will be much slower and wait so you have time to read the tips. The loading time will be significantly lower. Try to uncap frame rate and enter a new area. I have noticed this as well, and I have (more or less) proof:
