An audience of 10 million viewers is never very shabby, even for ABC. However, when it comes to "Lost," those numbers move the show from the "successful" to "struggling" columns.

However, the 10 p.m. Wednesday start might be making an impact on live viewers toward the negative, but when it comes to those who record the program to watch later, the effect is apparently very, very positive.

"Lost" had a 22.8 percent audience boost after factoring in those who watched the show within seven days of its original airing, according to numbers provided by Nielsen Media Research for the week ending April 8. That was a boost of 2.5 million viewers over its live average. "The Office" on NBC was the leader, however, as 31 percent, or 1.8 million viewers, tuned in to the show.

"Heroes" wasn't included in the list because the show did not air a new episode during the week.

Nielsen started clocking time shifts of 24 hours and within seven days beginning last September to get an idea of what the total audience of a show is. Viewers tend to record series where they have other plans, or if they are aired later than their own schedules allow. "Lost" moved to 10 p.m. earlier this season, which some say has made a significant dent in the ratings.

While the numbers also reflect households with VCRs, Nielsen did point out that DVRs, or digital video recorders, are now in between 15 and 17 percent of households throughout the United States.