I bet if the Galaxy Nexus was on Gingerbread, it would be just as laggy.
1.2GHz OMAP (Nexus) vs 1.5GHz S3 (Nitro)
Not really a big difference there. Hell, in most cases the Nitro is faster.
What do you guys think? Is Gingerbread just too outdated and not optimized enough to handle such a large resolution like 1280x720?