just tested it on ipad3, and it took exactly 1 minute and 30 seconds to load (using Chrome browser, though that probably doesn't make a difference), which isn't that bad (if you get get it down to a minute, you're laughing!)
One thing I did notice (which may have been mentioned elsewhere by others) is that on the PC, the scoreboard stays up when it's game over, and you can review your progress. On the ipad, the scoreboard vanished instantly and the game began again. This is probably happening because on the PC I needed to click the screen to start, whereas on the ipad my fingers were already 'in touch' on the screen so it thought I was wanting to begin again.
This problem can easily by solved by putting a well positioned start button on the highscore menu, located away from the edges of the screen where the players fingers are likely in touch, rather than having it be 'touch anywhere' to begin.