This is good news hopefully is is a trend:
Overnight TV Ratings up for Las Vegas: NASCAR ON FOX earned a major victory Sunday with a 6.2/12 for Sprint Cup Racing from Las Vegas. That 6.2/12 is a 13% gain over last year's 5.5/11 for the same race. This year's 13% growth for the Las Vegas race matches FOX's best gain for any single race in almost four years, since the 2004 California race posted a 14% increase. Sunday's 6.2/12 is FOX's best rating for the Las Vegas race since 2003 (6.3/13), which not coincidentally is also the last year that FOX's Vegas race was not preceded by a bye week. For the season-to-date, NASCAR On FOX is averaging a 7.2/14 for the Sprint Cup, up +3% over last year's 7.0/14. So far this season, FOX has aired four Sprint Cup events that were not impacted by weather (Bud Shootout, Daytona qualifying, Daytona 500, Las Vegas 400) and all four have either matched or beaten last year's metered market rating.(Fox PR), have not seen any ratings on Monday's rain-delayed Cup race.(3-4-2008)

There was a heck of a lot of people that did not get to see the rain-delay Monday Cup race. Most of us have to work during those hrs and by the time we got home the race was done. I never seen that race. I watched the progress of it on the Leaderboard on my computer at Nascar.com here at work so I could see what was going on and that was the best I could do. Could not even find a radio station to listen to the race.

I got home just in time to see the Nationwide race but no Cup.
They should have flipped the times and run the Cup second or done the Nationwide early that morning then had a long break and not started the Cup race until around 3-4 pm ET so at least more people could have seen the last half of the race.
And then at Vegas they have the nerve to keep talking about how good of a race it turned out to be after all that waiting. That was mean since so few got to see it. I am sure it was replayed on Speed but it is not usually at a good time and I did not get it taped.

I would not think the ratings would be very high for that one.