Fully agreed!

A few years ago I tested several engine versions of "King" and "Gideon" on different chess machines (128k, 512k and 1024k) and found no reasonable differences in solving times. No matter if the tested positions were midgames or endings. I did not try these positions with hash disabled but of course the solving times would noticeable increase in this case. It seems, the amount of hash doesn't matters much for most engines, as long as it is at least 128k on DCC's. Even if one can find the one or the other position where different hash sizes make a big difference in solving times, this will not have any noticeable influence to the overall playing strength of DCC's.

But of course this is only my personal opinion and i won't claim it the one and only truth in concerns to DCC's.
Kind regards, Wilfried