Was Piccolo referring to just #20?

[ahill1]

Was Piccolo referring to just Gero or both Androids here:

Chapter: 347 (DBZ 153), P3.2-3
Piccolo: “It seems that in the original history, we were supposed to be wiped out by you two androids…But it looks like the future has changed somehow…Was it that you weren’t as strong as we thought?...Or have we grown too strong?...

Piccolo said "you two androids", though one could alrgue they always group the androids like that, like in Vegeta's quote:

Chapter 343 (DBZ 149), P7.4
Vegeta: “I’ve realized by watching your faint movements up to now…That you guys don’t seem as terrible as the rumors made out.”

But at the same time, Vegeta could have judged Gero's strength based on his little movements against Piccolo:

http://mangafox.me/manga/dragon_ball/v29/c148/12.html

 

[SSJ2]

No

 

[ahill1]

No

So was he referring to #19 as well?

 

[SSJ2]

No, he was referring to 13 and 20, even though we only knew of 19 and 20.

 

[ahill1]

What about #15?

 

[Let's Go Fearless!]

Both