That strain gives about 75% attenuation. Your getting close to FG but it isn't out of the norm. I can't account for why it has taken a bit longer than usual, but it isn't all that out of wack. Someone with more experience could probably chime in. When you say 14 days, are you counting from the time you pitched or the time active fermentation began? Did you use a starter? If you used a straight pitch from the pouch that would certainly slow things down.
EDIT: While I was posting my questions were answered or somehow I didn't see all the posts. Sorry :-(