“Good Morning America” moved back ahead in the morning race for the Feb. 7-11 Nielsen week, while “Late Show With David Letterman” continued its torrid latenight pace.The Fox Children’s Network also had plenty to crow about, breaking a record the service established a week earlier in terms of attracting viewers in the age 2-11 demographic, the key sales criterion for the Saturday-morning daypart. “GMA” (a 5.2 rating/20 share, up 11% from the previous week) reclaimed the breakfast crown for ABC after trailing NBC’s “Today” (4.8/19) on successive weeks. “CBS This Morning” (3.7/14) also remains well above its corresponding average last year, while NBC still led among adults 18-49 with a 2.2 rating, topping ABC’s 2.0 and a 1.3 for “This Morning.” “Late Show,” meanwhile, delivered a 6.0/18 — its second-best average since September — despite the steadying performance of “The Tonight Show With Jay Leno” (4.8/14). “Nightline” (6.0/16) ranked second from11:30 p.m. to midnight. Letterman posted 3.7 and 4.0 ratings, respectively, among women and men ages 18-49, while Leno scored a 3.1 and 2.6 in those brackets. “Late Show” has also been recording big household numbers in Nielsen overnights for the current week, boosted by primetime coverage of the Winter Olympics. CBS’ daytime streak stands at an ostentatious 258 straight weeks, ranking first in households (7.0/23) and tying ABC (5.3/17 overall) among women 18-49. NBC delivered a 3.2/11 in homes and 2.4 rating in the key women’s demo, compared to a 4.1 each for the other webs. The Eye web’s assault included continued huge ratings for “The Young and the Restless” (9.2/29), which next month gets a primetime airing to commemorate its six-year run as the top-rated soap. NBC’s “Days of Our Lives” had its second-best rating since August. Fox Children’s Network turned in another dominating performance in Saturday morning, pulling a huge 8.6 rating among children 2-11, compared to a 4.8 and 4. 6, respectively, for ABC and CBS. Household standings were Fox, 3.9/14; ABC, 2.9 /10; CBS, 2.7/9. Initial daytime coverage of the Winter Olympics averaged around a 10 rating and 26 share Sunday, topping weekend sports.