The adoption rate for BlackBerry OS 5.0 continues to be slower than expected. When first looked at one month after release 61% of 9530 users had upgraded to OS 5.0.

An update to this study shows that the adoption of OS 5.0 is now up to 73%.

Still more than 1 in 4 users have still not updated to the newer OS, and at this point seem unlikely to do so.