I don't know how many people think the Dell Streak competes directly with the iPad, but whoever's in charge of purchasing Google AdWords (the paid ads that appear in the "sponsored links" section of Google search results) for Apple is apparently one of them.
Do a search for "dell streak" at google.co.uk and you'll see an ad for the iPad sandwiched between Dell and O2's ads (dell.com/streak redirects to the UK product page, so don't get excited). If we're playing a game of "which of these things is not like the other," then the iPad is obviously the odd man out.
I have both devices and have never viewed them as competitors but considering how often gadgets of any kind are compared to Apple products, I guess it's not surprising that Apple wants to at least try to reel in anyone interested in a tablet running a mobile operating system (why the iPad and not the iPhone, I don't know). The company isn't targeting Streak searches in the US yet, but that could change as soon as the device is released.