That you can hear the drummer move suggests that something is very *right* with the filter. In fact, I would have expected the opposite based on certain commentary: that the linear phase filter led to better spatial awareness and that the minimum-phase filter led to better high frequency instrument reproduction.
This comment rings true to me (pardon the pun!). When I compared the Sooloos Ensemble's digital out (linear filter) to the MC200's digital out (upsampling apodizing filter) into my Simaudio 650D DAC, the former sounded much more open and live, with more decay and spatial cues. The latter sounded more direct, with less decay and a reduced sense of the recording space and a greater focus on body and tone. Of course some of these differences could be due to the pairing with the Simaudio DAC but I noticed that the same sonic traits of the MC200 filter when using the MS600 as the DAC.
Another thing I would add based upon my comparison of digital outputs between the Ensemble and MC200 is that the up sampling/apodizing filter in the MC200 does impose a strong sonic fingerprint on the digital output signal. This is not the case with the linear filter in the Ensemble. Using the digital output from the Ensemble, I was hard pressed to distinguish differences from CD play through the Simaudio 650d's on board transport. The Ensemble may have sounded a bit better specially and a tad smoother but it was a tough call. Digital output from the MC200's up sampling/apodizing filter sounded distinctly different than CD play through the 650d, however. Subjectively for me, the difference was not an overall positive one as it sounded like the MC200 was altering the music but I'm someone who likes the sound of the Simaudio stuff so it may just be my preference. The point is, though, that the Meridian filter does have a distinct impact on the sound in my experience. Whether that sound is for the better or not is up to the listener and probably depends on their associated equipment.