Meths is generally okay, and speed is more often about management than raw power (and of course with a Trangia, be it gas or meths, you can leave it to its own devices while you do something else).
The only time when I've really regretted running on meths was when I needed the stove for snow melting for water (it wasn't somewhere you'd generally take a bike, mind). Slower than a very slow thing filmed in extra-slow motion while wining a slowness contest.
But the main reason I prefer gas to meths is it's more controllable and less fiddly, and doesn't involve pouring smelly, unpleasant fuel.
it is like buying a petrol fuelled car and running it on Calor Gas. It works but it is not what it was intended to run on.
More like buying a steam powered tractor and changing the power unit for a modern diesel, which gives you more power and less faffing. But while being a much more effective working tractor, it wouldn't win you a prize at a steam traction fayre or give you a sense of traditional pride.
Pete.
Often seen riding a bike around Dundee...