PRACTICE NOTES Have no way of getting and have not seen ANY site that does 10-15 laps averages or showing what lap is the slowest. Sometimes the NASCAR Leaderboard Average speeds are posted here, if they are accurate or they are combined with NASCAR Media speeds to get as much info posted as possible. Example if a driver slows down considerably on a lap [wreck or debris on the track], the average laps gets messed up and may not be posted. What you see posted is the best that could be found, no need to email and ask for other practice stats.

Happy Hour 'final' practice for the Shelby American Sprint Cup Series race at Las Vegas Motor Speedway is over, about 15 minutes early. The rain had held off and Nationwide qualifying and 1st Cup practice were held. Some results and notes:
#33-Bowyer 183.530
#42-Montoya 183.318
#5-Martin 183.299
#48-Johnson 183.250
#47-Ambrose 182.852
slowest: #26-Said 175.650 and #38-Gilliland 176.898
incidents: #88-Earnhardt Jr. spun off turn 4, no damage.(2-27-2010)

Saturday first practice for the Shelby American Sprint Cup Series race at Las Vegas Motor Speedway is over. The rain has held off and Nationwide qualifying was held earlier. Some results and notes:
#18-Busch 184.037
#16-Biffle 183.855
#2-Busch 183.486
#00-Reutimann 183.399
#33-Bowyer 183.299
slowest: #26-Said 174.678 and #37-Conway 178.731
no speed: #09-Almirola [wrecked Friday and likely a start-and-park Sunday].(2-27-2010)

Friday practice: for the Shelby American Sprint Cup Series race at Las Vegas Motor Speedway is over, some results and notes:
#42-Montota 186.168 [track record is 185.995 set last year]
#77-Hornish 186.085
#48-Johnson 185.835
#5-Martin 185.637
#24-Gordon 185.522
slowest: #26-Said 174.368 and #37-Conway 176.413
incidents: #29-Harvick [was 9th fastest] smacked the turn 2 wall early in the session, doing some damage to the right side of the car. #43-Allmendinger lost an engine and the team in installing a new one, so Allmendinger will have to go to the rear of the field on Sunday before the start of the race.(2-26-2010)

Las Vegas practice rank for the non top-35 drivers:
if things stay the same, these eight drivers would make the race:
#13-Max Papis, 15th fastest
#82-Scott Speed, 16th
#87-Joe Nemechek, 20th
#36-Mike Bliss, 29th
#55-Michael McDowell, 30th
#71-Bobby Labonte [PC1], 32nd
#09-Aric Almirola, 36th
#66-Dave Blaney, 37th
these drivers would miss the race if the order stayed the same:
#46-Terry Cook, 39th
#90-Casey Mears, 41st
[PC] = [past champion and order, 1 is more recent champ]