Then how much smoothing are you saying that they did - because that single axis midrange boost
and low treble dip, would tend to annoy me - and the bass still dives ( which is expected)
That's a good question, they don't specify but based on the shape of their response, I'd say no less than 1/12 octave, and more likely 1/6th. They'd have to be asked to know for sure.
That said, here's the same measurement from the article in unsmoothed, 1/12th, and 1/6th octave so you can see the difference. It doesn't change the midrange boost or bass rolloff you mentioned, but you'll notice that more narrow peaks and nulls smooth out. This may seem deceptive, to smooth out a peaked response, but in reality, is better representative of how our ears hear. We'll hear a wide mid boost, but not the various narrow peaks and nulls.
Also notice the scale. Many +/-3dB is a standard tolerance, but some manufacturers rate their speakers within 6 or even 10dB.
All this begs the question, "How do they sound" which is feel is answered in the review. Clear and present in the midrange, light in the bass, and slightly subdued in the high-frequency, which is supported by the measurements.