Redraw with /thorn, is there an actual delay?

Hey all, I have a quick question.

If I'm playing a plant/thorn, does the redraw with thorn create an actual delay to the attacks? I'm getting conflicting answers when asking in game, some swear there's no delay and it's all in my head, others say there's a DPS lowering delay with the redraw.

What's the truth? I figure this is the place for a good answer.

I believe it works like such:

You use Strangler. You use Thorny Darts. There is a 1s delay before your attack fires where you draw out your thorns. You use Strangler again, thorns are put away. You use Skewer but now have to redraw before the power fires again. Now that your thorns are drawn, however, you may follow up with Thorny Darts seamlessly.

So long as your thorns are drawn, there is no pause/delay between your thorns attacks but should you use a power outside the thorns set, you'll need to go through that draw animation again. For some people it's not noticeable but for others like myself, it gets old when you have for instance Spines/Regen with a click-heavy secondary and need to /RKellyPull_Out_My_Gun every time.

in theory the redraw is worked into the activation time.
it doesn't redraw for a second, then activate the power
it activates the power and while it is activating it also redraws

so in theory it adds no extra time
of course that might not be the case in practice, but testing has shown no significant delay due to redraw