The September 2011 issue of GamePro magazine features Riptide GP on page 85, under the heading "What's a Blast on Public Transit".
Reviewer Will Herring writes:
I'm generally pretty faithful to my iPhone, but playing this impressively rendered racer on an office-owned Android made me, admittedly, just a little bit jealous that it hasn't hit the iTunes App Store yet.
We're glad to hear you liked it, Will. And don't worry -- your iPhone may not have long to wait. Stay tuned!