Question about Alchemy potions...

[bOONDOGGLE]

I have a lvl 41 Shaman who is skilled up to about 40 in Alchemy. I made some Blood of the Wolf (SoW) potions and gave them to my lowbie alt.

He is level 5 and when I use the potion, I only get a 12-minute SoW.

Recently, someone else gave the same character (now at level 7) a SoW potion and it lasted for like 40 minutes.

Is the duration (and speed?) of the potion dependent on the level of the character using it, or the skill level of the alchemist making it?

I've read the wiki's and guides and haven't seen a clear explanation.