User blog comment:Psyclone 117/Summarizing the Best Day Ever/@comment-3257939-20140725070149/@comment-2006510-20140725221437

I'm more interested how you think one semester = going from how he was to fully competent... and if the timeline is accurate from Vol. 1, it wasn't even a full semester at that, more like days or weeks, if Sun was just telling Neptune about their encounter

There's definitely improvement of course, but it's not enough to be the end-all of training - plus his opponents simply outmatch him