When makingcache tiles,allowseveraloptionsfortext anti-aliasing as there isin Photoshop (sharp, crisp, strong, smooth). Today,ESRIusingSHARPtext anti-aliasing ,soas you can seethe example. In some casestheCRISPlook betterandmorereadable(Google mapsusedalso), so you shouldgivethe user the optionwhat kindoftext anti-aliasing istousethe displayoftext