There is some very blatant lying going on here by a poster with a few tens of thousands of posts under their belts who 've appointed themselves to acting as apologists for a long standing problem apple refuses to adress.
The fuziness in the zoom in fuction is neither minimal nor unoticeable. Why? Because lcd screens are by virtue of their underlying technology very poor at interpolating to lower resolutions. To some young eyes it might not seem that fuzzy but wait until your usage of computers (and who can afford not to use computers in this age) will degrade your eyesight. Is your eyesight something you are willing to risk?
And the problem is getting worse and worse as apple is using higher and higher resolutions panels to their machines (good for them, good for us, that's the way forward and what others are doing so) yet refusing to adress the defiency of their os in handling text sizes for these machines.
This is coming from a long time user of apple who owns countless of their machines and has suggested their machines to countless of their friends and family at the risk of getting overly insistent. I would not suggest using OS X at the moment to anyone with less than perfect eyesight or with anyone interested in preserving their eye sight. And I would never dream of not suggesting os x to people a year back or so.
But this is what happens when you fail to adress real usability issues, that are not matters of opinion, but rather matters of fact. People stop suggesting your products.
I would also urge everyone to leave feedback to apple on this. This is the only way you are going to effect the change you want to see happening. I cannot stress this enough, leave feedback.
As a courtesy to other users, I will however suggest a few workarounds such as menueverywhere and menupopup for larger customizable fonts for the menubar via a menu bar that either follows the window or pops up everywhere via a hotkey, tinkertool as was suggested, zoom functions is browsers. All of these are poor workarounds and they cannot be anything else if apple continues to refuse to adress such a core issue with their os.