1970-S Lincoln Cent Small Date?

I've got over 20 rolls of 1970-S Lincoln cents that I'm going through to see if I have any of the small date variety.
I've done several rolls and I feel like I'm seeing things (maybe my old eyes are tired).
Anyway, I've taken some pictures and I'm hoping someone can help me out. I have three different groups.
The first group, I initially thought that the two on the left were Large dates and the two on the right were Small.
However, when I see them here, I'm thinking they might all be Large dates.

Group 1:


Top Left:


Bottom Left:


Top Right:


Bottom Right:


Now here's Group 2, which I initially thought were all Small date. I now believe that only the top two are Small and the bottom two are Large:


and a close-up of Group 2:


Finally, here's Group 3, which I think the left 2 are Small and the right 2 are Large:


and a close-up of Group 3:


Also, how rare is the small date variety? I see Numismedia lists a G4 at $9 and they go up from there, so they must not be too common. I've had most of these since the early to mid-1980's and they've just been sitting in plastic tubes so I'm hoping that some of the 20 rolls are Small Dates.

Thanks for any input.