Yes and wizards get metamagic feats for free every 5th level.
Also, wizards get powerful teleportational spells; they also get blink, displacement and dimension door all of which are increadibly powerful in combat. Mirror image is just an insane spell; its basically 5 extra lives right there.
Finally, wizards are not bad at summoning too. Furthermore they get more spells that use attack rolls (like rays) than clerics or druids, giving them more options. Also, disintegrate is more powerful than nearly anything clercis or druids get.
Metoer Swarm completely crushes firestorm in terms of damage output and area of effect.
Druids and clerics are powerful yes, but IMO not near as much as people make them out to be. They are more useful in more situations than other clkasses, but not the most useful.