Search Firms Giving Bad Advice?

I just went to a free seminar hosted by a search firm that shall remain nameless and I was shocked at some of the things they said. Now correct me if I’m wrong but does anybody see any problems with the following two pieces of advice?
1. With AdWords, Google does not penalize all words in an ad group if one or more of them have crappy CTRs, quality score, etc. I could have sworn that Google DID in fact penalize the whole ad group and this was one of the justifications for keeping your ad groups as small as possible (such as only including a single broad, phrase and exact term in each).
2. It doesn’t make a difference whether your URLs with multiple words are broken up with hyphens or underscores as Google ignores them all. Ie. www.yoursite.com/cool-stuff-to-look-at is the same as www.yoursite.com/cool_stuff_to_look_at. Um…I […]

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