Strategy Analytics reported that Apple shipped an estimated 600,000 HomePod smart speakers in the first quarter of 2018. That accounts for about 6% of the market for smart speakers.
That is very impressive considering that this was the HomePod's very first sales quarter, and that the HomePod was only available for less than 2 of the 3 months in that quarter (HomePod was released on February 9, 2018), and that sales have been limited to only 3 countries (UK, USA & Australia) which make up only about 10% of the possible worldwide market.
Despite the limitations of sales only during ? of the first quarter, and availability in only 3 countries, sales of the HomePod in its first quarter actually outperformed sales of the first iPhone in its first quarter:
First quarter iPhone sales in 2007: 1.2 million units, which was only 0.3% of the total mobile phone market
First quarter HomePod sales was: 600,000 units, which was 6% of the total smart speaker market (a much smaller market than the mobile phone market)
In other words, the first quarter HomePod sales beat the first quarter iPhone sales by a factor of about 18x... There is one word that describes the HomePod first quarter sales performance: IMPRESSIVE.