I would say it depends what defines "consistently" and I would also say it's important to see how it's doing relatively to Sony.
For consistently, is it only 2 or 3 poor months, or 4+?
January was horrific for MS. I expect February to be much the same. But I think March will be better. But if April and May comeback to Jan levels, then they better be ready to be very aggressive with price.
I don't think they need to panic yet, but I'm sure they will be sweating March sales.
That really depends on how the sales compare to the 360 for a longer time period. If we just compare the first 3 months of the system, then Xbox One is doing much better than the 360, despite selling less in January. The panic might be premature.