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.

Saturday first practice: for the Food City 500 Sprint Cup race at Bristol Motor Speedway is over, after 50 minutes of practice, top five and some notes:
#48-Johnson 122.725
#42-Montoya 122.139
#24-Gordon 121.813
#88-Earnhardt Jr 121.705
#20-Logano 121.897
slowest: #37-Conway 116.122 and #71-Labonte 117.401.(3-20-2010)

Friday practice: for the Food City 500 Sprint Cup race at Bristol Motor Speedway is over, after 90 minutes of practice, top five and some notes:
#20-Logano 124.114
#17-Kenseth 123.961
#5-Martin 123.810
#48-Johnson 123.762
#9-Kahne 123.666
slowest: #37-Conway 117.365 and #71-Labonte 118.562
incidents: #18-Busch spun early in practice but didn't hit anything; #71-Labonte spun between turns 3-4 and backed in to the wall, will have to go to a backup car for qualifying; #48-Johnson spun around on the front stretch, no damage.(3-19-2010)

Bristol practice rank for the non top-35 drivers:
if things stay the same, these eight drivers would make the race:
#82-Scott Speed, 8th fastest overall
#66-Dave Blaney, 14th
#36-Mike Bliss, 28th
#09-Aric Almirola, 15th
#90-Casey Mears, 34th
#46-Terry Cook, 35th
#87-Joe Nemechek, 39th
#71-Bobby Labonte [PC1] would have to use the champ prov to make the race, 44th
these drivers would miss the race if the order stayed the same:
#55-Michael Waltrip, 40th
#13-Max Papis, 43rd
[PC] = [past champion and order, 1 is more recent champ]