Flash drive speed comparison

I picked up a SanDisk Extreme microSDHC UHS-I card. The packaging claims transfer speeds of up to 95 MB/s.
I ran some speed tests on my
Apple iPhone 4S using PCMark and the results were:
read: 18.73 MB/s
write: 12.90 MB/s

Next, I tested the same Flash drive using PCMark on an
Apple iPhone 7 and got:
read: 33.11 MB/s
write: 22.34 MB/s

I also decided to run a different test—using an SD Card test app on the Apple iPhone 7—which yielded these speeds:
read: 37 MB/s
write: 21 MB/s

Moving to my PC, I used a USB 2.0 card reader plugged into a USB 2.0 port, getting:
read: 30 MB/s
write: 18 MB/s

The question is this:
Since I don't own a USB 3.0 card reader, I can't verify what the speeds would be on my computer under better conditions. If I were to use a USB 3.0 port along with a 3.0 reader, would the speed actually approach what is advertised on the box (95 MB/s)?
Or would the performance just remain stuck at the levels seen on a smartphone?

I did check the authenticity via Android System Info, which confirms the card is genuine.

If anyone has any insight...
Thanks in advance.

http://www.tested.com/tech/photograp...y-controllers/

That card says "up to," which is just marketing speak for a theoretical speed that’s basically impossible to hit in the real world. Like the article above points out, it isn't just about the card itself; it's about the controller handling the data. If the gear you're using has a cheap or outdated controller, there's zero chance you'll see speeds anywhere near what they promised on the box. You've already seen how that goes.

Speeds really come down to what kind of files you're throwing at them. This type of memory is generally way better at multitasking, so you get those "perceived" speed boosts. Honestly, I wouldn't be surprised if they started caching Flash drives just like they do with SSDs and thumb drives nowadays...
At the end of the day, it all depends on what you actually plan to do with the card. It sounds like you might have already hit the ceiling with the gear you're using, so those theoretical speeds don't even matter anymore, right?

I appreciate the responses