Well, the jury still seems to be out on the "what is Oldhammer" question. Which I like, because it's interesting to see the varying perspectives out there. My own 2 cents:
As far as I am concerned they are certainly straddling that line and I can't commit to calling them fully either sort. They are certainly on board a ship that has left the Oldhammer Harbor, but they've barely left the bay and I think I can see the anchor is still dragging behind. If they come to dock again I'd certainly recognise them, maybe even welcome them depending on what sort of party I was throwing. But I'd also be aware that these guys set out on a new journey and they are not the orcs I once knew.
My biggest "for" argument is that they are Kev Adams work, and Kev Adams is a big name in Oldhammer circles. Personally I also put great stock in the fact that an artist's work is the main angle of interest, not whatever brand he happened to release it under. You can find his work under various labels and I personally think they are often very good Oldhammer fare regardless of age and make.
My biggest bugbear isn't to do with any timeline of release, but the conceptual design. They bear a striking resemblance to Mark Gibbons artwork that was used in the orc army list for 4th and my guess is that it heavily influenced Kev's sculpting work. This is the biggest departure from the older aesthetic for me. In older publications you see the work of Paul Bonner, Russ Nicholson, Tony Ackland, Gary Chalk, David Gallagher and others who undeniably helped form the look of the earlier orcs. Not so much the Adams ones of '93. I am seeing differences in costume design, weapon design, anatomical morphology, poses and facial expressions.
Scale creep — or whatever you attribute the size change to — is another point of interest. I am on the fence as to whether this is good or bad in my book, it rather depends on how you'd plan to use them. On the one hand it bugs me a little that they aren't "right" in scale for a more seamless mix/match blend with older orcs. But on the other hand maybe seamless regimental uniformity isn't what you want for your orcs. Some people welcome the image of a really ragged, jumbled mob. I also think they can make an attractive option for Big'Uns, who are present as an army list option pre 4th, and actually useful alongside old lead for Oldhammering in that sense.
So I fed this into my computing machine and the answer is that they are Oldhammer, but only to a degree of between 47-53%. If you give them a period paintjob and smack a banner the size of Essex on them they may even go as high as upper 80's. And if you paint them brown they become Ancienthammer, which you can learn more about if you go to the back of a bookstore and give the secret handshake to the old grognard who sits there reading the 1978 Ral Partha catalogue.
This thread reminded me of Zhu's excellent blog article on orcishness, very entertaining read and I will take the liberty to link it here
http://realmofzhu.blogspot.se/2015/12/an-unnatural-history-of-fighting.html