Isn't a 30% Total AD steroid kind of an AD steroid? :p
I felt so god damned vindicated when Triforce Jayce fell out of favor and BT rush became the norm. I don't think that SotD is optimal on Jayce, but that's mostly because Black Cleaver + Last Whisper is really, really dumb.
Uh. I feel like this would be obvious to anyone who knows what Teemo's skills do. Even if he could charge it, what's the point? Teemo has virtually zero mana consumption and his auto-attacks have a .4 AP ratio. There's literally no incentive to build Manamune.