Some....
Water left inside in a front loader outter tub is normal, but so is for a top loader.
Usually, the water that remains stays within the drain cup, it also happen with top loaders anyway..but some having a still outter tub like a filter-flo for example, can't be moved not being a suspended system so sound isn't made...
Others while having a suspended system, though have a different draining system than a cup and separate electric pump, so the sloshing isn't noticeable as well....
Many models of front loaders I have seen also, have a floating plastic ball in the drain cup/sump that prevents water to come back from the hose, but some models doesn't...
The quantity of water that stays-in may depends on many reasons, such as a long drain hose and or drain located very high of the machine...as the hose is longer or higher more water will come back to the lower point once machine has finished...
The sloshing sound is typical of every relatively new front loader washing machine I've seen in my life, except for the commercial gravity drain ones.... but it's mostly due to water bouncing in the drain cup rather than in the outter tub itself...
As long as machine drains normally the wash and rinse water...there's no reason to worry of anything..[this post was last edited: 12/31/2014-11:14]