I'm on 4.5 and hadn't noticed that had changed...it does seem like it used to take a longer press to come back from standby.
I actually don't use standby any more...I use Autolock (
http://www.geekandproud.net/blackber...k/autolock.jad) and my Pearl locks up automatically for me at a set period after the backlight ends, which I've found perfect for my uses.
I have a password set (something I think anyone w/a BB is foolish not to use - so much personal stuff on them) and autolock works great in concert with that.