I completely agree. Although with one caveat: I find the new "notification center" to be quite obnoxious and was surprised to find that the only way to turn it off (evidently) was to set the timeout to a very high number (e.g. 999999). Still it's true, the beauty of Growl is the fact that you can easily adjust it to suite your needs. Now if only Skype would update to support GNTP.