Very nice. I managed 14 10ks I was very happy with the results. Like you the true reward was the dust and experience. I had a very nice rare hatch ratio including a mareep, 3 Dratini, and 3 Larvitar. The candy on the last two were very welcome. One one Larvitar had nice stats @93%. Very pleased! The others are transfered.
27 fire and ice event 10K eggs conclusion
Well......I'm at the end of the event with egg hatching.
Over the course of the event week I managed to collect 30 10K eggs and hatch 27 of them with lucky egg earning a whooping 270,000 EXP :). Amazing!!
I have 3 10K eggs left over but too lazy to head out and collect more eggs and keep hatching after I was plagued with a ton of 2K eggs after the last batch hatch.
I'm a bit surprised by the results of these eggs
Mantine x7
Gligar x4
Dratini x3
Sudowoodo x2
Larvitar x2
Snorlax x2
Lapris x2
Mareep x1
Pineco x1
Chansey x1
Aerodactyl x1
Mantine is like the new Pincer for me lol.
I believe the true reward here is candy and 270,000 EXP.

Answers
I managed to hatch 10 10k and holding on to a couple for the moment. Highlights are 3 larvitar (one 510 cp at 93% IV). This will be my first t tar. Another larvitar at 89% (hp 15, def 15). Also a 96 IV mareep! It's been hard to break the 84% barrier for both Larvitar and mareep so very exciting times!