Windows Store: App Update Certified in 41 minutes?

I stayed up late last night doing a few bug fixes on one of my Windows 8.1 Store applications. I dropped the application package into the Store this morning for certification. I got an email from the Store;

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That was 09:59. By 10:40, the app had passed certification;

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So that’s around 41 minutes to go through the certification process – very nice to see the Store team delivering such a quick turnaround for a simple app update like the one I published with (hopefully) a few bug fixes in it.