Is this an issue?

We adopted an eight year old from Russia who arrived on the first of December - no English of Course. We put him right in school and on the first of March he told us in English he was giving up Russian and would only speak English. It is now eight months since his arrival and he speaks just like the other kids. Tricks? we gave him maximum exposure to other kids including after school programs. He had ESL support a couple of days a week - the rest was up to him.