Do you have any data to support that claim?

That was my thinking at the beginning, but then I talked with some of my friends developing mobile applications - freelancing and at few companies, showing them Jolla Phone.
They point of view is - if the market is enough they will go for the native app anyway, as they would be unsure running on emulated layer. Ie. they are developing completely different apps for the same purpose (said banking application) for Android, Windows, iPhone, Blackberry, not using any common layer.

If there is no market - they would not simply develop an app at all.

Having an emulation layer is the user choice and they were pretty surprised their apps worked so well on non-android phone. Having the experience that their apps have problems working even on some exotic (Samsung anyone) Android phones.

Ergo - Alien Dalvik makes close to no difference for software developers - if there is no ROI for native app, they will not develop a native app. Period.

We just need to wait until Jolla takes a significant part of the market, implement paid apps in the Store, allow more useful APIs in Store - and there will be native apps.

Android emulation layer is a factor in achieving that.