Yes, that seems a little long for me as well. Some things to check:
1) What is the "Drying Time per Print Head Pass" set at, under Advanced Media Control" in the driver? This is how long the print head pauses between passes and I've never set this to anything beyond 0
2) The print head has 180 nozzles per inch, to print 1 inch at 1440 requires 8 passes, 5760 requires 32 passes of the print head. So the 5760 setting will take 4x longer to print. Consider whether or not you really need the extra print resolution... Also the "High Speed" checkbox, if you have good alignment, will halve the print time by printing bi-directionally.
3) Can you try plugging in the printer via USB to eliminate that as a variable?
4) The whirring noises the P600 makes when it is first setup is a common phenomenon (mine did that, also see here as well
http://www.aardenburg-imaging.com/p600-project-results-part-i/ ). It should mostly stop after a couple of weeks. It "might" be related to purging air bubbles and such after initial setup (speculation).
Check the dry time and USB first and report back if there is still a problem.
Mike