We took Jennas off her at about 1, and I honestly dont think she noticed. It was such a joy! The only time it made things difficult was after a breastfeed sometimes she would wake up and get hysterical if she didn't have something in her mouth, but she soon got over it.
Its a tough one - I personally hate to see a toddler with something in their mouth like that, but if it gives them comfort, who really cares!!
We were talking about them on Saturday night at dinner, and the other (older mums in their 40s with gorwn up kids) said the ways they got rid of the kids dummies. One got their child to post the dummy to the poor little children than didn't have dummies. They put it in an envelope and addressed it, posted it and all. I think thats seriously cute
Jenna now cuddles her dolly and teddy at night to wind down, and they are there when she wakes up to play with. We come in and the dolly has her clothes taken off!!
Do what feels right - but dont be in a hurry to take it away if its really comforting.