This thing about quoting by method.
On jobs that have plain glass with larger panes, I tend to quote the same regardless of method. However, with Georgian or leads, the time differential increases greatly - especially on a hot day. IMO a Georgian or leaded job can take twice as long - perhaps more - than WFP. With plain glass, the differential is usually less - though it does depend what type of job it is. When I first switched to WFP, some jobs I had with those sort of windows went from being a fairly OK price or maybe even a not very good price to a decently priced job. A lot depends on property layout though. I reckon (with WFP) a 40 minute plod on the job pictured but if I pushed myself, sure I could do it in 20 minutes. I would feel happier taking 40 minutes though. With trad, I don't reckon I would do it in under an hour - especially as I'm out of practice now.