Initially, Verizon’s Tour 9630 users were quicker to adopt OS 5.0 than Storm users. One month after the official release of OS 5, 71.1% of users upgraded to the new operating system. The Storm 9530 in comparison, saw only 61.4% after the first month, and took a full three months to get past the 70% mark.
The higher rate for the first month may be due to pent up demand after Verizon and RIM took their sweet time releasing this. Although, the early release of OS 5 was more productive for the 9530 which has since climbed to 81.4% adoption.
These statistics come from the time of download of the popular free game Pixelated. Given that this game has been available for both devices for a while now, it is doubtful that there is any early adopter effect distorting these numbers.
There is another OS 5 adoption analysis from back in February available here.