I have to agree with jberry, I think the +R compatibility may be a bit more widespread than those of us kind of knee deep in the trenches may realise. We know about bitsetting, or how to find out what our players can play, and/or know to buy players that DO work with anything. but a lot of people who randomly buy DVD players off the shelves (or even do a lot of research but don't pay attention to DVD recordable playback) have issues...
I have quite a few players that don't like non-bitset DVD+R (yes, like a true geek I have multiple DVD players-- higher quality players, region free players, recorder/player
, game systems). I'm trying to think if any of them have trouble even with bitset DVD+R, maybe. Only one or two of those refuse to play DVD-R. Now, for me, if I can't play a disc I try another unit. but what if your ONLY DVD player happens to be one of those?
I think in the last year or so these things are finally getting straightened out; but I think there are a large number of players in the 1-3 year old range that are really iffy about recordable media, and ESPECIALLY iffy about DVD+R (bitset or not, although I will agree bitsetting brings DVD+R roughly up to DVD-Rs compatibility).
For stuff I burn for myself, or my parents (where I know what their players can do) I use whatever is handy and most appropriate. For sending to people who I don't necessarily know about their setups, I usually use DVD-R, and haven't heard of any problems...