This is why you shouldn't trust anecdotes.
I had the opposite experience. I had a problem with a Dell laptop a few years back and they didn't ask me to ship it back, they sent a tech out with a part to my home! Same week! Nothing beats having the tech fix it and test it and make sure it's working right there.
Lenovo, on the other hand, had 2 week shipping turnarounds and had me waiting for over a month before saying "we can't do anything except put in a new motherboard at your expense", putting me out of a device for 6 total weeks between shipping, waiting and shipping. My local computer repair shop had me fixed in a two day turnaround
I'll never buy Lenovo again, absolutely never.