[durbatuluk]

Sadly is hard to say anything without any value on axis. Difference between mean and 99% is 5s or 20ms? As someone said here, threshold for "slow loading" should be used before picking metric for measuring it. Pick graphic one and draw a line where users whine about slow loading, check how many are under and above. If the number of users below threshold value is "greater" then above threshold you shouldn't be so worried. How much greater can be picked from standard error from threshold measure from users.