I´ve read this multiple times here in the forums that actually the Terran SA is overpowered, and, in fact, incorporates the Manipulator & Organizer SA as well. Don't know if that's actually really is so - but it seems logical.
Craig is right, it's not overpowered. You could, eg. combine SuperBreeder with an all-econ approach and make way more money. You don't have to built a single ship actually, because your massive economy lets's you buy everything you need from the AI's. There's one guy who presented that as a thread here, works even on suicidal just fine.
To be honest, I haven't played all races in TA yet. Just half of them. My speciality is the Yor, and everytime I play a different race I suck big time, which lets me always return to my favs who makes a suicidal warfight a cakewalk.
One of the reasons I like them is that I can swap between all-lab/all-fac as I need - their improvements are powerful and have a low maint, so having un-used structures on a planet (preserved for later use) is not that costly. Contrary to what's been written here their economy is *overtly* strong - if one takes into account that they can techtrade for alot of civ-wide economic bonuses and improvements (while theirs are untradeable).
Just culture-flipping doesn't really work with them - on the other hand, their ingrained immense +100% loyality let's their planets also never flip, at least, not in my games.