Apparently, you CAN pull 5* cards from premium tickets.
I just used 20 premium tickets and pulled out an Eleanor.
All of a sudden, however, I've had a huge influx of people spamming on my wall regarding trade offers.
Well.. at least there's hope for free players.
Here are the stats of what I pulled:
2* - 8 cards
3* - 8 cards
4* - 3 cards
5* - 1 card