Well, to get speeds like that you're looking at USB3.0. If you google for USB3 thumb drives, you get a lot of comparative reviews by people who care about speed -- most of which speed you'd also get over USB2.

For instance, this review lists several thumb drives that can write a 4GB ISO in ~160s over USB2, which is 25MBytes/s. And twice that fast over USB3. Though I haven't tried any of them personally.

Peter