I'm actually studying professional editing at the moment, and one of the first things that has been drummed into us is that authors are irrational and often over-react to the slightest creative critisism. Best bet, I've been told, is to be ultra polite and make everything a suggestion and never, ever, so much as consider telling the author that they are an idiot and their spelling is the most dodgy thing you've seen in your entire life. I've heard of professional writers have hissy fits and kicking editors doors because a tiny mistake was pointed out. I find it interesting, compared to my experience with betaing, where people are quite happy to say "wrong".
That said, as everyone else has acknowledged, you did write it very politely. Unfortunately, when someone writes something, they are making themselves vulnerable, and most people find it very difficult to accept that the work they've put so much effort into is subpar, and react really badly to anyone who points it out to them, regardless of how it is put.
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That said, as everyone else has acknowledged, you did write it very politely. Unfortunately, when someone writes something, they are making themselves vulnerable, and most people find it very difficult to accept that the work they've put so much effort into is subpar, and react really badly to anyone who points it out to them, regardless of how it is put.