NBA sees ebb of international talent?

NBA teams drafted eight international players into their ranks in the first round of the 2003 draft.
Since then, not as many. The NY Times examines why, and brings up an interesting stat:

Teams appear to be straying from the recent trend of drafting overseas players because many of them have not lived up to expectations. Of the 39 international players selected in the first round since 2002 with no prior experience playing in the United States, only Yao Ming has surfaced as an All-Star. In that same time, 14 of 171 American players drafted in the first round made at least one All-Star team.

There are international players who have been productive (Boris Diaw and Leandro Barbosa), quality role players for playoff teams (Nene and Mickael Pietrus) and full of untapped potential (Rudy Fernandez and Danilo Gallinari).