No. But it feels eerily familiar, doesn't it? The Angels find themselves in yet another early hole.. and they're going to have a hell of a hard time to climb out of it.
By the way, when you say the A's will have their slumps and the Angels will have a chance to go on a run, sure...but so will the A's (and Rangers and the rest of the AL) when the Angels have their slumps.
The A's will regress, but you can't expect their record to even itself out just because they have started off 13-5. That's not how regression works. If the A's are a true talent 88-win team, and they play at that pace the rest of the way...that would give them 91 wins. That means the Angels would have to play at a near 95-win pace the rest of the way to catch them. Possible? Yeah. Highly unlikely? Yeah.