hudson plane video. coastguard source.

Unlike several fake/spoof sites, this is a genuine Video of the ditching and rescue.

http://www.nbcchicago.com/news/us_world/Stunning__Video_of_Hudson_Plane_Landing_Washington_DC.html

Pilot was great, must have mentally practiced what to do cos his time & opportunities were so limited. Video is real time so seems slow.

First you catch end of ditching run (on left of screen).
Loss of both engines on touchdown helps plane to float.
River current very fast, so Rescue Ferry seems to take forever to get there.

In all a great effort - with a lot of luck too.
If plane had not floated, in that cold fast water not too many would have been rescued.