There’s no specific time frame because they aren’t ready to give us the beta test client yet. They are still working on it, as indicated by the constant daily updates to it showing on the CDN (Content Distribution Network).
It would be irresponsible of them and look bad on them to promise a date and not meet said date if they somehow couldn’t finish the client before then and furthermore, promising release dates for unfinished products promotes rushing and rushing almost always ends up in a failed product.