Surprised it still doesn't have hyperlinks (and Twitter handles mentioned) clickable from the Timeline. Echofon has done this forever, and the Twitter desktop client does it.
It's more computationally expensive to calculate, draw and attach tap events to rows in a UITableView if you're trying to still keep 60fps scrolling. It's hard enough to get glass-like scrolling with dynamically-loading avatars and random strings of text at different font sizes all over, but tappable things and highlighting makes it even harder.
Um. What? While, yes, it is more expensive to detect that something is a link than not, it isn't that expensive to do. Neither is drawing an attributed string with Core Text. Yes, its hard. No, it isn't nearly as hard as you're making it out to be.
And making things tappable/highlightable? The tableview isn't scrolling when you're tapping. Detecting a tap and performing some calculations to determine which text run the tap falls on cannot cause scrolling performance to go down.
