That link takes you to a file that's the same as I've already got on my phone and it's ICS 4.0.4
First 2 digits of the ICS version is 77, first 2 digits of the JB version is 98.
My wife's razr m got JB pushed to it on Friday night, I haven't been able to force the update on mine.
Seemed "strange" to me that an update file would be named (on a website) the same as the version it was replaicng...with instructions to rename the file to "update.zip" once you downloaded it to your phone.
The "Update.zip" file on the sd card of my wife's phone had the proper date/time stamp to indicate it had arrived when I saw it arrive.