I hate it when nail salons lie about the wait time, just to get you to stay. After being told 10-15 minutes, I gave up after waiting 20 mins because I knew the next available technician was still 5-10 minutes away from finishing her other client ahead of me (which would have resulted in a 25-30 min wait for me). Be honest about your wait time; if it's too long, I'll come back-- and I'll appreciate your honestly because it shows you respect my time. If you're dishonest about the wait (because I truly believe you know how long it'll take you to finish up a service), then you lose regular customers like myself.