Yeah, they say the DVD -R works the best in home players. I've used both but I think it depends mainly on not only the format, but the quality of the disks too.
I once bought a Sony 10 pack of DVD +R and 4 of them were turned into coasters.
Now, I use Ridata DVD +R and buy them in bulk packs from newegg and I haven't had any problems with them at all.
I think its more or less luck of the draw.