In my experience, you will probably get leaves, though fewer than normal, but flowers are unlikely. Some of the tubers may rot, too.

they may as Tug says not flower this year.
However they will grow and right themselves. Are you certain they are upside down? the claw parts should go down. Having said that before I new which way to plant them I used to lay them on their side. The roots as they emerge will pull them the right way up.

welcome to GoY too.