Haven't stayed in WH, but WBC is certainly close. It's actually closer than any of the "onsite" value resorts. I can be parked in any theme park parking lot in less than 15 minutes from WBC.
That said, I've seen a number of posts saying the driving time from WH was almost the same as from WBC. It doesn't look like it on Google Earth (looks like a 15-minute drive to WDW property), but I've read that several times.
I agree with the previous poster -- if you have a car, I think you can drive to any theme park quicker from either WBC or WH than by busing from an onsite resort, with the possible exception of MK because of the fact that Disney buses drop you off AT MK, not at TTC.
And obviously, you'd be able to monorail to MK quicker than drive from the monorail resorts. Monorailing to Epcot from a monorail resort would be a tossup, IMHO.