Selecting single words, letters etc. works fine, yes, but Chromium seems to tend to select whole elements rather than only the ‘visible’ text. There was a particular case recently where this annoyed me greatly, I will try to remember it as my memory currently appears to be blacked out.
(Another annoying bit about Webkit in general: if you underline an element (such as a link) and then use sup inside this element, the underline is moved up under the superscript.)