As others have indicated, the usual range is 15%-20% here too, depending on service - if it is great and is genuinely friendly and courteous, then the rate can go up to >40%. Does this happen often? No. Even at restaurants known for service, I can't say that many personnel are genuine and really look after (and anticipate) guest needs. That being said, it does seem to me that what is expected as a tip has gone up. I remember when receipt tip guides had 10%, 15%, and 20%. Now, they start at 15% or 20%.

When I go to my stylist, I pretty much expect that she will have some ideas as to what to do with my hair that would look great on me. I give her a blank canvas and expect results. The fact that she has given me consistent results deserves a (high) tip. ^