It has already been shown that black immigrants outperform American blacks. What you need to show is that Afro Guyanese UNDER perform other black immigrants.
In fact people born in South America who self identify as blacks outperform even other black immigrant groups. The bulk of these will be Guyanese because Colombian and Ecuadorian immigrants to the USA don't self identify as blacks. Data on Caribbean black immigrants are diluted by those migrating from Haiti, Cuba and the DR who do less well than do those from the English speaking islands, this for obvious reasons.
Druggie as hard as you want to paint Afro Guyanese as ghetto dwellers all you do is reveal your racist nature. Yes you and Ksazma.
The data indicates that there is little difference in how immigrants from assorted English speaking Caribbean nations perform. Jamaicans do NOT under perform Guyanese or Trinidadian even though this is a 95% black group. So either blacks from Guyana and T&T are losers when compared to Jamaican blacks, or Indo Caribbean migrants to the USA perform around the same as do those of African descent.
Now examine within the machinations of your racist brain why suggesting that Afro Caribbean = Indo Caribbean performance in the USA is something that you find to be so offensive. It is a neutral statement.