No, not really. When you go back to .905 you can check for updates and ICS should be there when it's available to be pulled (generally the day after it's pushed).
You can also go forward now to .247 which should be the same as the OTA. Take a look at SamuriHL's House Of Bionic - DroidRzr.com for more info.
You can also go forward now to .247 which should be the same as the OTA. Take a look at SamuriHL's House Of Bionic - DroidRzr.com for more info.