The dealers in my local casino aren't allowed to accept tips, so I guess it varies.
That article made me laugh... "As you sit down at a table make sure you introduce yourself. Your name and hometown is enough information but if you feel like it is not then you can offer up what profession you work in as well." Really?!?
If you play black jack do a bit of research before you play in a casino. A lot of the regulars can get quite edgy/chopsy when you stand on 16 against the dealers queen, likewise when you hit your 14 against the dealers 6
If I see one of my friends playing black jack I tend to stay away, as he is quite vocal when what he calls 'part timers' play dodgily.