On other hand - I have written a entire blog article about how shitty Apple customer care in India is - http://gnufied.org/2011/08/30/the-applecare-story/
I assume that's why there are so many new Latitude/Precision keyboards on eBay at any given time (people bullshitting their way to getting spares and then selling them on).
Only after I posted my experience on a public forum I was contacted by a Dell social media person in the US who then organized support from Dell Netherlands.
Dell customer support was hostile from the get-go, claiming "compatibility" problems with my MacBook. Compatibility? What could cause my laptop to be incompatible with the UP25 and yet compatible with the U23? Hogwash.
They finally agreed to exchange the monitor. They sent a refurb.
Since then, I've read multiple stories of people having problems with Dell monitors, using Windows or OS X. A common thread is the DisplayPort connection.
I also feel like you are comparing Dell's enterprise support to Apple's general customer support...
Apple requires that you book an appointment at one of their stores, go there, wait on line anyway because there are people who don't want to book online, have someone who can't fix hardware problems look at it, and then say they'll take it but you must give them your file vault password first.
Dell on the other hand after ten minutes of hardware troubleshooting on the phone comes on site with replacement parts. If they can't fix it they send it back for you, and you can request that they give you the hard drive in the machine before they send it. It's very excellent.