No one is saying they'll both replicate their 2008 seasons, we're just saying they'll continue to provide above-average level of production,not suddenly turn into Cesar Izturis and Scott Hatteberg,and because no player "replicates" a given season, then your statement is wrong even in its nature.
And again, you keep running your fingers without giving us any type of statistical evidence or at least a worthwhile empirical analysis, you're all like "Pedroia is 5'9, he won't hit 20 homers" with drool running down your chin, and IMHO, if you can't provide with any type of proof that either player will SURELY regress in 2009, then i suggest you STFU.