I'm not twisting anything. By definition, an ace and a #1 are the same thing, subjective as the definitions may be. When people refer to a #1, they are talking about an ace-type pitcher.
Ace: Pitcher capable of headlining a rotation and facing off in equal ground against any other team's best pitcher, while providing a significant amount of IP per season.
#1: Pitcher capable of headlining a rotation and facing off on equal ground against any other team's best pitcher, while providing a significant amount of IP per season.
In other words, Lackey is neither a #1 nor an ace. However, if he keeps this up, he could end up having a #1 or ace type season. There's really no need to further complicate the definition of a pitcher's production.
To further clarify my position, although every team has a #1 spot in their rotation, not all of those pitchers are #1's, or aces. Take the San Diego Padres for instance, who started the season with Edinson Volquez in the #1 spot in their rotation. However, Volquez is not a #1 or an ace.