2. People like to call their characters' build with some names. These names aren't "hardcoded" anywhere, but just people's idea what their build stands for, i.e. how they feel about their character.
3. No one can beat game in 6 hours, no matter what level of difficulty. There's simply too much to do, even if you know exactly what to do, when, in what order, etc. Just travelling from location to location (and all of them in order to complete quests, without any fight, without actually doing quests) would take more time than that.
Maybe it was referred to some quest, or something else you didn't get right. Not sure...