I don't put all that much stock in these lists as they are apt to cycle over into new modern classics every 40 years or so. I also find it hard to believe that two authors can account for that great a percantage of any list, much less the top ten of that list. Booth Tarkington might have found a place much closer to the top ten 40 years ago when his book was just reaching its senior citizens age, just as Charles dickens might have 40 years before that. I use this lists for amusement and occasionally for finding gems I've missed. But the bottom line is that reading and appreciation is, at the end of the day, a subjective art, and no two lists will ever be the same.
Thanks for the interesting post