Yes it can be annoying. At the end of the day did the guy ACHIEVE THE OBJECTIVES? ie. did he meet the hard tolerances like height/speed etc requirements which you had hopefully pointed out during the briefing? And in you judgement did he operate the aircraft 1.safely 2.confortably and 3.efficiently? That is what i look for. In saying that,there are grey area. Sometimes something which would strictly be a failing point I may let off as long as it is not unsafe, let's say just something which needs abit of work. You kinda get a sense of the student, you know, an overall picture, and for example if this guy is enrolled in a full time integrated course and you know he will get it with just abit more experience then that's ok with me. Of course i'm not condoning being a pushover or anything.