Its not bad at all imo, I don't see PC gaming as bugged to the extent that it ruins the experience. To this day, there are only two games I've played that had game crippling bugs and they were Thief 2: The Metal Age (the game itself is extraordinary though) where you simply couldn't finish one of the missions because you were never registered leaving the area after having completed your objectives. It took a 42MB patch and this was in the single line ISDN days so that was kind of a big deal.
The other game was Gothic 3, a good game at the core but it had way too many bugs for my taste.
My confidence in console game quality is not exactly undamaged either, huge blockbusters like the GTA series gets away with some really amazing (not in a good way amazing) bugs for instance. There are also generally a lot of shit games that run horribly to the point of nearly not being playable.
The mere fact that most new console games are updated with big patches quite often shows that they have their share of bugs as well (some of it is new content though but there are a lot of fixes in them as well).