In 1990 the Air & Space Museum hosted a couple of pilots that had flown Hurricanes in the BoB as part of their 50th anniversary remembrance - I was fortunate enough to be able to go to their discussion. I wish I could remember their names right now (I'll have to go dig up the program I brought back from the event - they were kind enough to sign it for us). I remember quite clearly they were asked if they thought their Hurricanes were being outclassed by the 109s they had come up against, as the 109s were faster, had a 20mm cannon etc. Pretty much the same arguments that I am seeing in this thread.
Their answer was a clear and unequivocal no. Their reason was that while the 109 had a higher top speed and could dive away from them if he got in trouble, if he did that then he was abandoning the bombers he was escorting and was effectively neutralized. Most of their engagements were over in a matter of minutes and began with them diving in on a group of German bombers and escorts that were lumbering along at the cruising speed of the bombers. The controllers gave them altitude and position data and they always did their best to make sure they came in higher than the enemy so the battle would begin with them coming screaming through the enemy formation because they would almost certainly be outnumbered.
Couple other things I remember -
1. One of the guys had a 109 kill to his credit, along with a couple of bombers (Heinkels I think) -- but he quite clearly let us know that he was after bombers as his top priority. Every night they would listen to the reports of civilian casualties from bombings on the radio, and that got them fired up to stop the bombers. His 109 kill came because his squadron leader would sometimes divide them into 2 sections and have one section dive in first on the bombers and then the other section would dive in on the escorts diving in on the first section and clear their tails.
2. If they did get intercepted by the escorts and a furball started, they could always tell when the 109s got low on fuel because they would suddenly break away and start running back towards the channel. That was fine with him since it meant that there were some bombers behind him someplace that no longer had fighter protection.
This thread got me remembering that perhaps the biggest advantage the Hurricane had was the huge cojones on the men that flew her.