RIM's BlackBerry Z10 is still just a few days old, but initial sales already appear to be off to a better start than the launch of Nokia's flagship Windows Phone 8 handset, the Lumia 920… that is, according to one bullish analyst.

"Our recent store checks suggest that initial sales of the BlackBerry Z10 are off to a solid, if not healthy start in the U.K.," Barclays analyst Jeff Kvaal said in a note obtained by AllThingsD. "We believe BlackBerry's Z10 is off to a better start than the Lumia 920. The solid initial demand is a positive step in our view, despite the number of challenges that remain."

This is good news for BlackBerry, even if it is from one analyst. The company will no doubt face tough competition from Microsoft in the enterprise space, but also against iOS and Android, which are now used in enterprise bring-your-own-device programs. Kvaal's statements don't necessarily reflect that of Wall Street overall, however. One analyst suggested BlackBerry 10 was late to the party.

We still don't know BlackBerry's initial sales figures, but we do know that Nokia sold 4.4 million Lumia-branded devices, which covers several smartphones, during the fourth quarter of last year.