Are intelligence scores correlated with detection of second stimulus in an Attentional Blink test?
CHCH mentions in the comments that Attentional Blink has been shown to correlate with operation span, a component of working memory. (Colzato et al., 2007)

It has also been demonstrated that working memory correlates highly with general intelligence. (Colom et al., 2004)

So yes, performance on an attentional blink task correlates with intelligence scores.


  Colom, R., Rebollo, I., Palacios, A., Juan-Espinosa, M., &amp; Kyllonen,
  P. C. (2004). Working memory is (almost) perfectly predicted by&lt; i>
  g. Intelligence, 32(3), 277-296. PDF
  
  Colzato, L. S., Spapé, M. M., Pannebakker, M. M., &amp; Hommel, B. (2007).
  Working memory and the attentional blink: Blink size is predicted by
  individual differences in operation span. Psychonomic Bulletin &amp;
  Review, 14(6), 1051-1057. PDF