There have been some issues regarding the Internet Radio feature. It appears that while it works fine in some installations it is having some buffering problems in others. This maybe due to particular ISP, routers, switches, but the precise cause is proving somewhat elusive to track down. It only seems to affect particular radio stations, some are playing fine, others hardly play at all.
The simple answer to your question is no, I don't think anyone knows for certain, but as soon as the radio is sorted it will be pushed out immediately.
I do think some users had 2.1 last week, but the roll-out was halted as soon as this quirk was reported.
I'll report back as soon as our shop system is bullet-proof and I would expect the updates to continue soon after.
Rick