Hi J,
Is there ever a good place to report a problem?
Sorry to hear you're having this issue. I use v11.0.2 on Windows XP every day and don't see that problem. Typing is very brisk and never an issue. To be sure, I just tried again, and everything seems to be fine.
I don't doubt there's something going on, but I suspect it's something unique to your configuration/setup. Please contact product support and provide all the usual info from Help > About SlickEdit. If possible, please include a sample file indicating where the problem is occurring.
In the meantime, the most likely candidate is that Comment Wrapping is causing you problems. Select the Document menu and make sure the Comment Wrap item is not checked. Or go to Tools > Options > File Extension Setup and select the Comment Wrapping tab for more options.
--Scott