I ~believe~ Renee is talking about the "paging" of screens of individuals as one scrolls, re-sorts, or resizes the results pane that holds the columnar data fields in People view.
That concern would make sense. However, for the other views where WebHints appear, they often do not appear all at once. Sometimes you can see the light bulbs coming on one at a time. There is obviously a background and asynchronous process (probably a thread) that is searching the internet for the WebHints at the same time the user is interacting with RM.
I guess it would seem to me that for People View, this background process would have to be relaunched each time the people on the screen change, which is something that doesn't have to happen for Pedigree View, Family View, or Descendant View. But given that there has to be a background and asynchronous process that is searching the Internet for WebHints, I don't quite understand why Descendant View can take so long to come up when WebHints are enabled. It's like it's processing all the WebHints for Descendant View at once, even though not all the people in Descendant View are on the screen at the same time.
In any case, it seems to me that WebHints for People View is a solvable problem without destroying the performance of RM. I hope that it gets at least looked at for RM8.