Superior Rune of the Mesmer not functioning

The 6th bonus in the set of https://wiki.guildwars2.com/wiki/Superior_Rune_of_the_Mesmer does NOT change daze durations. I only tested on thief so far.

I probably won't test the rune on any other profession.

It seems to me, this is still the case: At the very least the displayed Daze Duration does not increase, as the 6th bonus states. I do not know, if this only affects DISPLAYED daze duration or also actual daze duration.

Test: Mirage with 6 runes of the mesmer equipped, mouseover on f3 shatter skill: 1s daze. Remove one piece of equipment with superior rune of the mesmer, mouseover again: still 1s daze.

Countertest: Trait domincation with confounding suggestions: displayed daze duration on f3 shatter skill: 1,5s. So generally the display for increased daze duration works, but for the Superior Rune of the Mesmer it does not work.