Doesnt this just suggest this is not a mug era? The fact that talented teens can't in fact break into the top 100 and challenge the top guys from this era shows how tough the competition has become, NOT how weak the quality of the pool of teens (poor D.Young).
To be honest, spindly 17 and 18 year olds breaking through and winning a GS or two like Chang and Becker doesnt say much for the overall quality of the guys at the very highest levels in those apparently "strong" eras.
Not really, more like it shows how hard it is to break through as a youngster when everyone ranked ahead of you plays virtually the same or similar style. There's no room for a talented youngster with a well rounded game to stand out because the surfaces and styles of play have become so homogenized.