I think People may actually be realizing that SW has never really relied on amazing acting abilities. Listen to any actor from SW and all of them have said it was "less than Stellar" work. Liam Neeson said it, so did Alec Guinness. Natalie portman and Harrison Ford have strongly hinted at it with thier minute enthusiasm for the series. Even many performances from Carrie Fisher, and Mark Hamill in other fims have been more or less "wooden".
SW has always been a B-movie that got popular, with unknowns and a plethora of B-movie actors.
In a lot ways there are similarities between the 2 trilogies.
1 or 2 well knowns: Sam Jackson, Alec Guiness
1 actor that is a long term success: Harrison Ford, and most likely Ewan Mcgregor.
Sorry, just had to complain about the "1 or 2 well knowns" comment. Just Sam Jackson?
What about Natalie Portman? Oscar nominee?
Jimmy Smits?
Christopher Lee?
Liam Neeson?
Terence Stamp?
Hey, even Keira Knightley and Sofia Coppola.
Please don't try to tell me they aren't well known (okay, Sofia and Keira had bit parts, sorry.)
Back up to 83% and on this page they have a Star Wars special thing.
http://www.rottentomatoes.com/features/special/star_wars/
It also lists the following tomato reviews for all films.
STAR WARS TOMATOMETER LIST
Fresh: 83% Star Wars: Episode III - Revenge of the Sith 2005
Fresh: 65% Star Wars Episode II: Attack of the Clones 2002
Fresh: 62% Star Wars Episode I: The Phantom Menace 1999
Fresh: 80% Return of the Jedi 1983
Fresh: 98% Empire Strikes Back The 1980
Fresh: 93% Star Wars 1977
So all the films have been rated fresh.