NEW YORK NYTimes.com kept its strong lead in February as the top newspaper Web site, besting competitors across the country in unique audience, page views, and time spent per person on the site, according to Nielsen//NetRatings. Rounding out the top five in uniques were USATODAY.com, washingtonpost.com, LATimes.com, and WSJ.com. The New York Times site (which has some articles behind the TimesSelect pay wall) attracted a unique audience of 12,960,000 users in February, who combined for 455,527,000 page views. USATODAY.com came in second with 9,050,000 unique visitors and 169,517,000 page views; the Washington Post's site had 8,030,000 readers and 154,836,000 views....