No, LXj is correct, the author is wrong...

They have stated that they are only allowing rejuv to have its ticks rate increase and that is through the glyph he mentioned. They are NOT allowing the others to do so because it is a test. Additionally Lifebloom and WG already tick once per second so they functionally cannot tick faster w/o them ticking faster than the GCD which would greatly OP the spells.

If you read the text for the Glyph of Rapid Rejuvenation (NOT the Glyph of Rejuvenation which is a totally different glyph) you'll see: Glyph of Rapid Rejuvenation - Your haste now reduces the time between the periodic healing ticks of your Rejuvenation spell.

If the talent did what you stated it to be, there would be no reason for the glyph. And if haste effected Lifebloom and Wild Growth, they would need glyphs for this as well since it already isn't a given for Rejuvenation by the existence of the glyph.

' I do know, however, that this talent now allows rejuvenation, lifebloom, and wild growth spells to scale with spell haste.'

So no, this talent does not now allow these to be effected by haste. We could already go for 1 second GCDs prior to this talent and that is why that part of the spell was nerfed. They wanted to make it harder for us to reach that because of the rejuvenation blanketing that our class has done since the Lifebloom nerf of 3.1. This talent was basically just a big +haste for those 3 spells that are primarily effected by the GCD. This is northing new.

The talent mentioned is a nerf to the GCD that those instant casts enjoyed previously but the real difference is that the spell now applies to regrowth, nourish, etc. Thus this helps our heals that have a casting time.