Well, you don't really see Mexicans/Central Americans coming to the New York and New Jersey area they way the were in the 1990s/early 00s. The population appears to have stagnated, and I do know that the Ecuadorians and Brazilians have been going home in large numbers over the past few years (or going to Europe).
This is anecdotal evidence of course, but, then again, so is this article.