Can camera write as fast as the card can take?

People are chasing after faster cards, now up to 20M/s.
I am just wondering if the camera can use all the speed at all. There
is no information I can see in the spec about how fast the camera
writes. e.g. if your camera cannot write faster than 10m/s , then why
but a 20M/s card?

Can anyone tell me where I can find such spec for the camera? I am
thinking about a FZ 20, in particular.



ABC
Do not reply by email.