Felipe's measurements are on page 30 of this thread.
He compares the actual RPR to CityWalk walkway (.4 miles) to the walk from the corner of Hollywood and Adventure to Citywalk (.5 miles).
But remember, the plot of land that CBBR is being built on is about half a mile "tall" (running North to South) so depending on where the buildings are, it could be a 1/4 mile or more just to get from the CBBR buildings (or pool area) and over the new bridge to Felipe's CBBR start point. But the RPR Pool/Buildings are very close to Felipe's RPR startpoint.
So, I respectfully submit that the walk from CBBR to CityWalk will be (significantly?) longer than the walk from RPR to CityWalk.
And besides the extra distance, I wouldn't want to make that trek along Hollywood way with little kids....
I'll take the bus!