Although your analysis is spot on, it is missing a few key points which seem to have been consolidated into words ("A big boost coming from mirrorless cameras") when fleshing out the numbers could be informative.
All numbers are Jan-Mar, so only 1/4 of the year.
Looking at production...
Worldwide Production of Mirrorless Cameras - Year Over Year (YOY) is up 44.1%
Worldwide Production of DSLR Cameras - YOY is down 4.7%
Looking at shipments...
Worldwide Shipment of Mirrorless Cameras - YOY is up 45%
Worldwide Shipment of DSLR Cameras - YOY is down 8.3%
Breaking down shipments by region...
Shipment of Mirrorless to Japan - YOY is up 36%
Shipment of DSLR to Japan - YOY is down 9.3%
Shipment of Mirrorless to Europe - YOY is up 44.9%
Shipment of DSLR to Europe - YOY is down 15.8%
Shipment of Mirrorless to Americas - YOY is up 78.1%
Shipment of DSLR to Americas - YOY is down 11.7%
Shipment of Mirrorless to Asia - YOY is up 39.1%
Shipment of DSLR to Asia - YOY is down .9%
Again, worldwide shipments of Mirrorless are up 45%. The ONLY region with shipment growth above the worldwide average is the Americas which has increased 78.1%. Diving into those numbers further...
Total interchangeable lens camera shipments to the Americas = 535,114
Total DSLR shipments to the Americas = 409,823 which means DSLR represent 76.6% of the market
Total mirrorless shipments to the Americas = 125,291 which means mirrorless represent 23.4% of the market.
Worldwide, as cited by CR, mirrorless accounts for 36.4% of all shipments however in the US, it's only 23.4% of the market. But again (as I've illustrated above), the MOST growth, YOY, is coming from the Americas which means that, compared with last year, the growth in the "Americas" market for mirrorless is driving mirrorless adoption worldwide - at least compared to the average adoption rate across the planet.
*note - shipments to "other areas" show a larger percent increase YOY for both DSLR and mirrorless, but the volume is so low that it only represents 2% of the entire ILC market.
Interesting numbers!
A prior manager of mine used to say (in regards to looking at performance) that looking at a single piece of data for a short period of time is like looking at a photograph - it's a moment. However, when you look at lots of sequential bits of data and they all point to the same trend, it's like watching a movie. In this case, we're looking at YOY data, which is definitely movie-like. Not only that, the data confirms what's been seen for years now. DSLR production and shipment are still declining while mirrorless is still climbing.
*disclaimer - this is just MY analysis of the numbers. It's not an indictment or condemnation of either camera line. Keep the hysterics to a minimum, please.