I seriously doubt that. But again, not to start a religious discussion. I have had S60s and BB, I am more productive with my BB, you may be more productive with S60.
I never was able to find a VPN solution to access servers on my company network that behind our sonicwall firewall. I also was never able to find a VPN solution for my BB as well. But the BES setup on a BB allows me to access every server behind the firewall thru the BES, no VPN needed. Its hard for me to be productive without access to every server in my network.
On my BB I can handle mail only once, file it and it done. I cant do that using M4E on my S60 devices.
I am sure you can site an examples of how you use your phone more productively on S60. I am not saying the BB platform is perfect. But I am probably more of a pure business user than most here. I use my phones 99% for biz and 1% for fun.