I'd noticed that Kallis had particularly astronomical stats against the minnows, though I haven't had the time or inclination to check whether it's disproportionate to other batsmen in the 50+ club. Lara, off the top of my head, hasn't played Bangladesh and - from memory - also missed the last 2 series against Zim, so I don't think he's had any significant boost.
Having said that, Kallis did look absolutely immense - the proverbial immovable object - against the Windies last year. Granted, it was a poor attack (undermined further by atrocious fielding) but he was just a remorseless run-making machine (I think I might have paraphrased The Simpsons there!).
Anyway, it will be interesting to see whether he can dominate - or at least prosper against - Harmison and Flintoff and prove that he deserves to be up there with Lara, Ponting, Sachin, Dravid, Hayden etc, as the stats suggest.