Pre 6.0, most holy priest ran with renew glyphed because a glyphed renew that got refreshed ticked heal-wise as hard as glyphed but haste-wise as unglyphed. So you got 5 ticks of a hard hitting renew instead of 3 (glyphed renew 4 tick was 16.66%).
This shouldn't be present anymore. I'll have to make sure though.