[quote name='DarkonJohn']I wonder if that is typical performance for these cards of if maybe there's something "not quite right" with yours. I have two 16GB M2 cards (San Disk) and I never noticed and speed issues using them in my PSP-2000 or PSP Go (then again, I wasn't paying particular attention).[/QUOTE]
It is slow for me too, I'm getting 2MB/s max copying from the PSP GO internal memory to the memory card and a little less from my computer to the memory card.
[quote name='DarkonJohn']Did it come with a M2 to MS Pro adapter so it can be used in a PSP-2000?[/QUOTE]
It does not, but you can buy one for $1.50 from the same seller, it should be a bundle deal below the product picture on amazon.com