My X1 yoga has no trouble what-so-ever and I dropped it a few feet.. (and it rattles along unprotected in a leather bag every day)...
You may have dropped it a few feet, but I drop my MacBook Pro all the time because I'm a terrible person. This dorm-bed fall has happened several times now too. The durability is simply off the charts, and I can't say the same about ThinkPads. They just feel so flimsy, everything bends or flexes on them.
In all seriousness four comments:
- I bend my X1 fully around all the time, not problem with the hinges
- all X1's I have ever seen have 3-year ON-SITE warranty, your friend should call support and get it fixed next business day (where s/he is).
- Strength and "flexiness" are not related, often materials are allowed to flex to keep them from breaking. The X1s are made of carbon fibre and have sufficient strength even if our ape-brains prefer something that does not flex...
- and even if not, there is always next-day onsite warranty (mine is upgrade to 5 years - not having the option of onsite for Macs is alone a disqualifying trait for me)
One of my friends has dropped his Air out of his lofted dorm bed numerous times and you couldn't even tell by looking at it, it's totally fine. One of my other friends has a ThinkPad Yoga and the fancy hinge was fucked within two weeks of purchase.