I am currently evaluating Lightroom after Apple decided not to support Aperture and have .tiffs from newspapers I photographed for years ago.
Lightroom does not import many of my tiffs. If I go to import and navigate to the folder containing the tifs, LR says there are no images to import. If I go into the folder and add .tif to each image (even though Mac OS and Photoshop recognize it), lightroom will recognize it. With all due respect to Jim Hess, why would any form of compression offered by Photoshop be an excuse for LR not to recognize an image? I am personally not looking forward to adding .tif to thousands of my images and this is a shock to me.