I have some 2s, 4s, and some 10s (the speed rating, whatever MB/S it correlates to). I also have some 2, 4, 8, and 16 GBs. 1) Do the smaller GB work faster because of less access time? 2) Does the speed really matter on 16MP JPEGS that I'm taking? 3) When does the speed really start to become noticable? The reason I ask is because I actually prefer older 2GB cards because my computer can only read up to 2GB without the USB adapter. But I'm debating if I should buy some older 2GB used (you can't find them in stores) or if I should get some newer cards. I've never had a speed problem before, well, I've never noticed but I've never really looked for it either. I only take one shot at a time and usually zoom it to look at it after.