Rolling resistance as a result of tire width, rubber composition, inflation pressure and road conditions can certainly vary.
http://www.terrymorse.com/bike/rolres.html

There are numerous other discussions, some in great detail, on the Internet - do a simple search using the terms: bicycle rolling resistance.

To quote one of them: "In general terms, the total drag of a cyclist will consist of 80% tire rolling resistance and 20% wind resistance at 10 km/h or 6 mph. At 40 km/h or 25 mph the numbers will reverse, with total drag consisting of 80% wind resistance and 20% tire rolling resistance."