Ehhh, maybe its fine as long as you didn't remain on the gas when it was slipping. A very short slip here or there isn't going to hurt long term.
When a clutch slips, you don't get grinding, noise or hard shifting (unless extreme). What happens is the clutch metals get super hot, warp and can then cause the clutch friction plates to rapidly wear and can even smear from the intense heat. The metals once turn dark (bluing), they are finished and will never be the same. The engine oil gets burnt...ect...
At the very least, if you find the clutch is not adjusted correctly (from factory, mind you), the dealer
needs to see this or notified. If documented, you are (hopefully) covered if you get per-mature clutch wear in the future. Sometimes early on clutch issues don't show themselves till many miles later as normal wear happens.
Really sucks you must go through this on a brand new machine.