Last year I trained by mostly racing and group rides.
This year I've got an Ergomo and the HunterCoggan book and followed it.
Results:
Road race results were much poorer than last year. Not in the top 10 much.
However TTs show improved times. I have dropped my 26.5m TT time by 1.5mins compared to last year (similar conditions, same bike).
With better pacing strategy I've also become 1 minute faster over a 7 mile circuit.
I believe this is because I've not done group endurance rides and not done hard chain gangs. I've been doing a lot of FTP work instead (less time training). As a result I've got better at TTs but the hill sprints have suffered and there is nothing left in the tank at the end of long races due to lack of endurance.
A better plan/ coach might have solved that issue.
At least I am able to see the Wattage gains, however they have not been significant, perhaps only 5% which I could put down to equipment error/ testing error. I've found it disappointing as there is of course no quick fix to getting faster and I've had to realise that I'm genetically middle of the road.