What we see on tv is not what a fighter feels in combat, I'm not saying Chael was right but he wouldn't say that unless he felt something.
That something was probably Silva just holding on and not being offensive or not even trying to get Chael off him.
Maybe Silva felt like he had more resistance until Chael landed that elbow, afterwhich maybe Silva just went into defensive hold on mode.
In any case, what Chael said is essentially right - Silva was under Chael for 4.5 rounds last fight, and the whole of the first round. Intentional or not, Silva has unbelievable mental strength to come out that second round and finish Chael at the first opportunity that presented itself, hands down and all.