ABC dominated its network competition on the second Sunday of the May sweep, riding more boffo scores from “Desperate Housewives” and “Grey’s Anatomy” to an easy ratings victory, according to preliminary nationals from Nielsen. CBS, meanwhile, did just OK with its biopic “Elvis.”

From 9 to 11, the ABC combo of “Desperate Housewives” (roughly 11.5 rating/27 share in adults 18-49, 26.5 million viewers overall) and “Grey’s Anatomy” (roughly 8.5/22 in 18-49, 18.8 million viewers overall) easily defeated the opening night of two-part CBS pic “Elvis” (3.9/9 in 18-49, 13.9 million viewers overall). Although “Elvis” was about 30% above the Eye’s Sunday movie average this season in adults 18-49 (3.0/7), its perf Sunday was less than gangbusters.

ABC also ruled in key demos at 8 with “Extreme Makeover: Home Edition” (6.0/17 in 18-49, 14.8 million viewers overall), besting Fox’s hour of firstrun “The Simpsons” (4.2/12 in 18-49, 9.2 million viewers overall), CBS’ “Cold Case” (3.2/9 in 18-49, 14.6 million viewers overall) and NBC’s “The Contender” (2.8/8 in 18-49, 6.1 million viewers overall).

Fox’s animated lineup, despite declining about 20% from its big opening one week earlier, remained a solid second in 18-49 with “The Simpsons” and week two of “Family Guy” (4.5/11 in 18-49, 9.7million viewers overall). At 9:30, “American Dad” (3.7/8 in 18-49, 8.2 million viewers overall) was in a tight three-way battle for second in 18-49, retaining 82% of its “Family Guy” lead-in.

NBC was above average from 7 to 9 with “Dateline” (2.1/8 in 18-49, 5.7 million viewers overall) and “The Contender,” but ran last among the major nets from 9 to 11 with “Law & Order: Criminal Intent” (3.5/8 in 18-49, 11.1 million viewers overall) and “Crossing Jordan” (3.6/9 in 18-49, 11.5 million viewers overall).

Preliminary 18-49 averages for the night: ABC, 7.1/20; Fox, 3.5/10; CBS, 3.2/9; NBC, 3.0/8; WB, 0.9/3.

In total viewers: ABC, 16.9 million; CBS, 13.2m; NBC, 8.6m; Fox, 7.7m; WB, 2.2m.