It's important to note that in-room response measurements for speakers should not be interpreted at face value, unlike the approach one might take with headphone frequency response measurements. This difference stems from the fact that the in-room response of speakers includes a combination of direct sound and reflections. In contrast, headphone frequency response primarily consists of direct sound, with only minor reflections above 3-4 kHz, depending on the headphone's cup size.
For human auditory perception direct sound is perceptually dominant over reflections. So, if a speaker has a flat or boosted on-axis treble response and a dramatically attenuated in-room response, it might not sound like it has recessed treble to our ears as much as in-room response of speakers suggests.
Measurements can reveal a speaker's accuracy and how effectively its designers have incorporated the principles of human psychoacoustics into its design. However, due to the non-linear nature of human hearing, it is always a good idea to experience speakers firsthand rather than relying solely on in-room response measurements.