Coded Logic: Already there. The growth rate for Jdubs is less than the population growth rate. And the Jdub growth rate has been falling every year for at least the past 15 years. I think within the next two to three years we'll actually start seeing negative numbers.
The bOrg doesn't break down statistics by language within a country, but given the paltry overall growth rate in the US for many years, my guess is that the only growth has come from Spanish speakers, and that the English speaking numbers have actually decreased. The Spanish have saved the bOrg's butt in the US and allowed them to continue to report gains.