I don't like snorkels. I am also generally very conservative with my rig, especially when away from home. Things happen and poor decisions can be made. While in Utah last year this happened in my snorkel-less land cruiser. Yeah, that is water coming over the hood. Luckily the only thing to come from this was a few drops of water in the airbox.
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Needless to say, that was too close for comfort. I installed the least obnoxious snorkel I could find as soon as I got home. If a $100 plastic pipe can help get me home vs. stranding me it's money well spent.
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To bring this full circle back to the original post. I have regularly observed my intake air temperature for years. Adding the snorkel DID NOT reduce the incoming air temperature in the intake or improve drivability in any way. The snorkel does create some intake noise that is especially noticeable with the windows down.