Mobile computing i.e. tablets and phones have spawned another and different generation of the browsing public. The new generation don't want to fiddle with the hardware or OS, even if they know how to. Apple have created a walled garden for this generation, they don't have or want to worry about add ons, side loading, jail breaking, bugs or viruses they just want to be able to have a problem free experience. The iPad gives them this and more. Any web site or developer that wants to be mainstream and doesn't cater for this will get left behind. That isn't to say that Android is dead but it needs to improve to maintain its viability in this market.
Now to return to the OP's question, again the problem is unlikely to be the iPad and more likely to be the ISP's management of its bandwidth, his own wifi environment or a combination of both.