So far so good- WP8 announcement has not slowed WP7 sales yet

There is a lot of concern that Windows Phone 7 sales will suffer due to the lack of an upgrade to Windows Phone.

There is of course the counter view – that buyers in general do not care at all whether a phone will get an upgrade, hence Android’s success.

When last we reported on this we were concerned than an increase in the interval between the usual 100,000 increase in monthly active Facebook users jumped from 13 to 16 days, indicating a slow-down in Windows Phone growth.

Now 14 days later the MAU number had another reassuring 100K uptick to 2,300,000 users, indicating so far at least the announcement has not resulted in slowing sales.

Using our previous ratios we estimate there are now close to 15 million Windows Phone users, a small proportion of the smartphone market, but still a respectable number for developers to take advantage of.

Hopefully this trend will continue, which will not only be good for Windows Phone in general, but for Nokia in particular.