Ratings for ABC's Desperate Housewives may be down somewhat this season, but Sunday's season finale handily beat everything else in sight. The show averaged a 12.3 rating and an 18 share, the highest-rated show of the night. Nevertheless, the numbers were 24 percent below last year's finale, which registered a 16.1/24. At 10:00 p.m., ABC's critically praised Brothers & Ssters, which has been making steady improvements in the ratings (and, some critics say, in its scripts as well), wound up in first place with a 9.0/15. Earlier in the evening CBS's 60 Minutes continued to dominate the 7:00 p.m. hour, recording a 7.7/14. ABC took over first place at 8:00 p.m. with the second hour of an Extreme Makeover: Home Edition season finale that averaged a 7.9/13.