To me, 'peruse' would always and only mean to read carefully.

I disagree B & b!

For me it could mean "having a casual glance at" as in
He perused the books on the shelves, but couldn't find anything of interest.

This wouldn't mean that he examined the title of every single book on the shelves in a painstakingly accurate fashion. In fact it's almost another "browse" equivalent.

Business use different, perhaps?