One effective way of juggling the two types of slides I've found is to stick the reference slides into an appendix that isn't part of the actual presentation -

One effective way of juggling the two types of slides I've found is to stick the reference slides into an appendix that isn't part of the actual presentation - but can be quickly pulled up during ensuing discussions, and for the benefit of people reviewing the slides later. High-level stats during the actual presentation, meaty details available upon request.