According to Wayde at Gizmo Cafe it is and I’m inclined to agree at this point. Had the merger produced a more unified service, it would have been something of note, but since they’ve decided to still play it separate, the combination has no real effect at all.
Anyway, you should check Gizmo Cafe for a pretty amusing video about the situation. Wayde wisecracks through his explanation and there are even tinfoil hats — and lets be honest, who doesn’t love tinfoil hats?
Why an XM / Sirius Merger Doesn’t Even Matter [Gizmo Cafe Blog]