A drop to 75% might not sound like that big of a deal, but it is particularly impressive considering Apple's expectations. Tim Cook, Apple's COO, described Android tablets as "vapor" next to the iPad. Also, Android tablets have barely gotten off the ground. They may well enjoy a meteoric rise in the coming years, much like their smartphone brethren.
The Galaxy Tab hasn't been as popular as expected, selling only "a small number" of the 2.1 million shipped units, according to Samsung's Lee Yong-hee. But also in Q4 of 2010, Apple was left with 525,000 more unsold iPads than any previous quarter. If nothing else, the expectation of further Android offerings might have diminished the iPad's appeal.
It's important to note that the market share statistics come from units shipped to retailers. That figure doesn't really capture consumer demand, so much as anticipated consumer demand. But it's still clear that Apple had better bring their A-game with the iPad 2.
source: Yahoo! News