Ratings for the series finale of ABC’s “Lost” were much like the critic reviews: mixed.

The emotive two-and-a-half hour closer was seen by 13 million viewers and drew a 5.6 preliminary rating among adults 18-49. That’s the highest-rated “Lost” episode in two years, but a softer number than one might have expected given the massive amount of anticipation and publicity leading up to the finale.

It’s tough for a heavily serialized show to post big spikes once it starts to decline (and “Lost” has been gradually eroding for years). For what was essentially a decorated clip show, ABC’s pre-show “Lost: The Final Journey” (11.4 million, 4.0) performed very well. The “Jimmy Kimmel Live” special on “Lost” drew 3.2 million viewers and 2 million adults 18-49, the talk show host’s third-largest adult audience ever.

Reviews were all over the place: NY Times said it was a “a bit of a cop out.” LA Times gave it was negative, USA Today went to the other end of the spectrum, giving it four stars out of four. Gawker said the finale was “two-and-a-half hours of slow-motion bullshittery.” The Onion’s AV Club disagreed, writing it was “highly effective.” Maureen Ryan loved it. EW called it “refreshing.”

On NBC, the “Celebrity Apprentice” (9.3 million, 3.4) finale was up 10% from last year’s closer despite running against the “Lost” event. Fox’s one-hour “Family Guy” finale (6.3 million, 3.1) was down 21% from last week. Finales for “Simpsons” (5.7 million, 2.5) and “Cleveland Show” (4.9 million, 2.3) also took hits from last week.

In other LOST-related news, Syfy has signed up “Lost” director/executive producer Jack Bender as director/executive producer for the 90-minute action-adventure pilot for “Alphas” (working title). Find out more here.