Sigh, Jdsr4c. I'm not personally attacking either you or your logic, so I would appreciate it if you would offer me the same courtesy. Resorting to hyperbole and namecalling doesn't help you make your arguments; it just makes you argumentative.
Of course there is such thing as an "average donation." The reason "average donation" means something in this context is the same reason "average" means anything in any context. Is this person an "average" contributor or a "below average" (or "above average") one? You have chosen a ratio to make that determination; I have chosen an average.
I didn't mean giants specifically as 'crap'; I was more referring to just dumping your cheapest and most plentiful troop regardless of what people were asking for. But since you brought it up (and as Llor points out), I'm surprised that you haven't run into more people who don't like giants in their clan castle. In every clan I've been in I see a quite a few complaints about them (and now that we can request specific troops, I see a lof of "no giants or goblins"). Whether that's because they don't fit their attacking style, or don't want them because they plan on using them for defense, I don't know. I agree they are better than an empty clan castle, but unless you've waited until their timer is nearly done, you've prevented someone else from donating a troop they might really want. Of course, some people really do like them, so donate away to those folks.
I do happen to disagree, though, that they should be the standard clan castle filler; I personally would prefer a clan castle full of archers over a clan castle full of giants. But again, if your clan likes giants, great.
And I also disagree with goblins and archers and barbarians being weaker than giants. Individually, of course they are, but the point of the Tier 1 troops is they take up so little space. And yes, a giant takes 3,000 elixir and 2 minutes to train. But five archers takes 1,500 elixir, and 2 minutes and 5 seconds to train. Per housing space, giants actually take less time to train than anything other than barbarians.