I'd say something along the same lines as why does your shift key not work and why does your period key work so aggressively? Snarky of me? Maybe, but there's a standard to posting in this forum, and this post fails it. That, and as far as I can tell... they're not. The RGS does okay, the Republic Attack Shuttle is fine, and as far as Jedi Starfighters go, Ashoka's is no better or worse.
There have been some notoriously bad sets over the year (anything with Wookie in the title, the Imperial Shuttles and Imperial Lander), but the current lineup is about as solid as those that came before it.
You know, if I see links to Brickshelf, more often than not, the first thing I click is the "Back" button.