Poles are the values of "s" that make the denominator zero. In both expressions you get that.
s+3=0; s=-3; s+2=0; s=-2;
s/3+1=0; s/3=-1; s=-3; s/2+1=0; s/2=-1; s=-2;
In the second link I can't find anything that suggests the opposite. What it does is to show how to draw an asymptotic bode plot.
In the expression |H(s)|=A ...
it does say that p0, p1, p2... are the pole values, but
pole values would be -p0, -p1, -p2 and so on.