I haven't tried it myself but unless they're discussing their own flawed subjective preferences pertaining to their having decided it's "better than", and considering most of them can listen to identical op amps (LM4562 Vs Renamed LM4562) and swear that one is improved over the other, I really put no faith whatsoever in such statements.
If you look at the specs and measurements I think it's safe to say it stands no chance playing in the same field as the LM4562, but if you haven't a clue how to implement such a thing optimally, you're going to run into serious problems with bypassing with the higher bandwidth LM4562 and variants before you will with one that has 1/5 that power bandwidth. That alone will likely account for the most significant difference both in sound and in use.
Looking at the measurements again I"m a little concerned with the uglyness in graphs for gain and phase which look nearly chaotic, particularly in phase, and particularly throughout the audioband. Perhaps an artifact of some distortion cancellation scheme? However the same dirt appears in all graphs across that range, from PSRR to CMRR.
LM4562 should walk all over this, but it's going to come down to your implementation of it, and if you do them both appropiately it will again just end up sounding like the DAC with very little in between.
In terms of changing out small caps I have no idea which ones you mean, but in terms of what's generally used by manufacturers and their intrinsic flaws, as to what's actually available for use to swap with? There is some risk envolved, you could make it worse, but if you use the right parts, it can help improve the quality in output from the DAC considerably.
You have to start looking at the whole as a system though. While those "little caps" are probably a weak area well worth singling out, do not neglect how they interract with their surroundings. Some, in fact, are going to matter a lot more than others depending where they were used. This is why it's a great idea to practice on a cheap card though. You'll get experience out of this that will be transferable to every other card or or commercial audio gear.