@jif510 -   a search for [ Google Android Phone ], a search for [ "Google" "Android" "Phone" ] and a search for ["Google Android Phone"] are all different.  The last one searches for that exact phrase.  The middle one is mostly like an AND search for the exact three terms but may include some extra results on the end that only have two of the terms or (less likely) one of the terms.  The first one gives early results like it was the third search but rapidly includes other stuff and by the end is including complete garbage.  But there is a very good chance that the information you are really looking for occurs early in the search, even if you have a lousy memory and typed [Google Robot Phone] instead.  Or at the very least provide you with enough information you can make a better search.

The change is that ["Google" "Android" "Phone"] replaces [+Google +Android +Phone].  Why?  Google's explanation makes no sense.  But except for ease of use, nothing seems to be lost.