Again, percentage increases don't tell you much unless you account for what they're increasing from. The fact is that digital already pulls in way more money than BluRay.
That seems like a very convoluted and somewhat conspiratorial way to account for what's being reported. An easier way to explain it is that the tech press is aware of the misleading nature of talking about rates of increase that doesn't acknowledge absolute numbers.
Of course it's doing "fine", the question is what's going to happen in the near future.
The only numbers that have fallen have been for DVDs. And that's largely because the DVD format no longer has a huge backlog of eagerly anticipated catalog titles waiting to be released. It's pretty much new releases that now drive the DVD market, and sales for new titles have not slid nearly as much as they have for older titles. Basically, most of the older titles that people want on DVD have already come out, and the studios have drastically cut back on the special collector's editions on DVD. Those bonus features are now going to the Blu-ray versions.
Look at what you wrote-- you start by citing Blu-Ray's increasing percentage of optical disc market share as evidence of the format's success, then follow up by dismissing the slump in the DVD market as inevitable. So...... Blu-Ray gets a bigger percentage of a decreasing market.