I thought I'd throw this out.
Remember the recall GM did recently when it came to faulty ignition switches? When people found out that GM actually did know all about the issue for years but never recalled them until much later (when fatalities have already occurred), GM's public image was pretty much a goner at that point. Sure, some of GM's recent cars are appealing (I want that 'Vette Z06), but in the public eye, GM's public image has already been tarnished, far beyond what it would've been if they recalled them way earlier when they first knew about it.
Will Samsung's image be shaken by this recall? Absolutely, but it could have been a lot worse had they not do what they have done. If Samsung just ignored it and had more Notes blow up out there, even causing some harm, Samsung would be hit with much more than just some doubt and a loss in market value.