Consider a corner's three main divisions: entry, middle and exit. Which of them seems the busiest to you? In my surveying of thousands of riders, entry wins hands-down. Having the corner's entry under control generally gives riders a breath of confidence. Getting entries wrong tends to start one off on high alert, induces panic and is a definite distraction, mainly because the moment to correct the line passes too quickly. Choices in line are rapidly eliminated; what apex and exit lines can be achieved past that point is more luck than skill.