Blight Smothering Towers increase enemy attack speed.

I was looking at the poedb data for the various blight towers and noticed something suspicious

Imbuing Towers while in range of rank 3 buff towers apply a buff with the following
blight_aura_stat_1 [25] (%Attack & Cast Speed)
blight_aura_stat_2 [30] (Movement Speed)
blight_aura_stat_3 [30] (%Critical Strike chance)
blight_aura_stat_4 [30] (%Damage)
blight_aura_stat_5 [600] (%life regen per minute)

These stats I can confirm from the character sheet. But when you look at the Smothering tower data something is strange.
Blight Smothering towers will apply
blight_aura_stat_1 [25]
blight_aura_stat_2 [0]
blight_aura_stat_3 [0]
blight_aura_stat_4 [0]
blight_aura_stat_5 [0]

And Buffed by a rank3 tower
blight_aura_stat_1 [25]
blight_aura_stat_2 [0]
blight_aura_stat_3 [-20]
blight_aura_stat_4 [-20]
blight_aura_stat_5 [-15]

It would make sense that since they use the exact same stat text that the modified stats are the same. blight_aura_stat_1 is positive unlike all the other stats.
I now have to test whether the modified stats match the types of the imbuing tower. Hypothesis: Positive Blight_aura_stat_1 means extra attack and cast speed.

I went and captured some video of a monster basic attacking inside and out of a smothering tower, tracking the attack animations and it took less frames to repeat the animation. This suggests the hypothesis to be true. Of course I only have poor back-engineered data so I can't be certain, but it would be nice to check.