[Samsung Galaxy Nexus] demarcmj:
Let me start by saying that I'm not trying to bash your work. There are clearly a lot of folks on here that like what you've done with these apps.

That said, the whole premise of your post seems to be flawed... You said that the basis for your work was that "I found some stock apps a little too different to ICS's stock Holo theme." It seems to me that you may be confused when it comes to the definition of "Holo." You can see that the Android design guidelines say,

Android provides three system themes that you can choose from when building apps for Ice Cream Sandwich:

Holo Light

Holo Dark

Holo Light with dark action bars​

You seem to be under the impression that Holo = Holo Dark, which clearly isn't the case. Pretty much all of the default Google apps use one of the three Holo themes listed above. In fact, MOST google apps use Holo Light (or Light w/ dark action bar). Look at gmail, email, calendar, talk, voice, messaging, maps, google+, youtube, etc. Looking at the Messaging app (since that's one of those that you themed), Google clearly went with "Holo Light with dark action bars." It seems like Google chose to use Holo Dark more for the system stuff (like settings, the app drawer, various system dialogs, etc.) than for apps.

For the calculator, there's no real action bar (main or split), and the content area doesn't use any lists or anything like that, so it's hard to say that it's not "Holo." The default shades of grey and dark grey that they used on the buttons seems to match exactly with the stock ICS keyboard buttons, so I think that is what they were going for there.

For the Contacts app, you do have a bit of a case in that it's not 100% Holo, but the only thing that is not is the blue color they use in the action bar and header text. Aside from that, it's still clearly Holo Light. My guess as to what they were thinking here was that they were probably using the contacts app as a way to demonstrate this idea from the same Style Guide:

"Pick the system theme that best matches the needs and design aesthetics for your app. If your desire is to have a more distinct look for your app, using one of the system themes as a starting point for your customizations is a good idea. The system themes provide a solid foundation on top of which you can selectively implement your own visual stylings."​

Perhaps they wanted to show how you can still make soemthing that matches the Android 4.0 look-and-feel while using a different color scheme, whatever that color scheme may be.

Again, I'll reiterate my opening comment: I'm not bashing your work. I'm only taking issue with the assertion that these themed apps are somehow closer to "stock Holo" than the default apps (I'll give you a slight pass on the contacts app though)

EDIT: That was a whole lot of typing and it seems I didn't actually get this part out:

To be more accurate, you should add the word "DarK" to your title (and first post) since that is really what you're doing. You're taking things that are already Holo, but light, and making them Holo Dark (or in the case of the Calculator, you're taking something that isn't really using any form of Holo because it's so simplistic, and making it look more like Holo Dark)

It should be called "...ICS Holo Dark Style..."