I noticed that too, my first thought was road salt, lots of corrosion on the intake, alternator and A/C compressor. The plastic and rubbery bits to the left and right seem to be fairly spotless?
I think the radiator has been replaced and didn't line up correctly. Each of the mounting brackets are missing a bolt. That lighter area just below the radiator cap looks like mine did as mine was starting to form its crack, same location too. Maybe the white stuff and corrosion is being caused by leaking coolant?
The more I look at this 53,000 mile engine picture, mine are starting to look pretty clean!
Dan