Re: Performance
"I'm beginning to notice a trend: global evaluative statement about oOo/LO but then when engaged with I can never get any detail..."
As someone else mentioned Office is one of MS's cash-cows - they and their 'friends' shall we say will probably do a lot to protect it.
A further note on performance. I used Excel extensively for data manipulation/modeling a few years ago but when I first started using OO I was disappointed with Calc's performance. It was much slower than Excel for the size of dataset I was manipulating. That's all changed - it's now very fast.