Microsoft Office and OpenLibreOffice.Org suck and are slow, but I can't recall a time where they loaded a document part way.
Google Docs is always loading like half a document in a reasonable amount of time and then doing who knows what. It's almost usable for text documents, cause you can usually at least see stuff, even if you can't edit it. It's just trash for spreadsheets; especially when it's like i'll take your input but won't run your formula for a while. I'm not entering the Excel World Championships here, my spreadsheets would calculate 'instantly' on a 486 in excel 5.0 if I had such a setup. If the documents fully load and there's no weirdness, sure it's fine enough; and the multiplayer features are handy, but it's not worth it for single player spreadsheets IMHO.
I haven't had the experience of using Microsoft's Office in a browser, I can only imagine the fun involved there.
Google Docs is always loading like half a document in a reasonable amount of time and then doing who knows what. It's almost usable for text documents, cause you can usually at least see stuff, even if you can't edit it. It's just trash for spreadsheets; especially when it's like i'll take your input but won't run your formula for a while. I'm not entering the Excel World Championships here, my spreadsheets would calculate 'instantly' on a 486 in excel 5.0 if I had such a setup. If the documents fully load and there's no weirdness, sure it's fine enough; and the multiplayer features are handy, but it's not worth it for single player spreadsheets IMHO.
I haven't had the experience of using Microsoft's Office in a browser, I can only imagine the fun involved there.