Update delivery-overview.md

Author: joeynmq

src/connections/delivery-overview.md

@@ -20,6 +20,8 @@ Delivery Overview has three core features:
 You can refine these tables using the time picker and the metric toggle, located under the destination header. With the time picker, you can specify a time period (last 10 minutes, 1 hour, 24 hours, 7 days, 2 weeks, or a custom date range over the last two weeks) for which you'd like to see data. With the metric toggle, you can switch between seeing metrics represented as percentages (for example, *85% of events* or *a 133% increase in events*) or as counts (*13 events* or *an increase of 145 events*.) Delivery Overview shows percentages by default.
 
 ### Pipeline view
+> info "Delivery Overview has a **5-minute** lookback period to provide more accurate metrics for the entire pipeline.
+
 The pipeline view provides insights into each step your data is processed by enroute to the destination, with an emphasis on the steps where data can be discarded due to errors or your filter preferences. Each step provides details into counts, change rates, and event details (like the associated Event Type or Event Names), and the discard steps (Failed on ingest, Filtered at source, Filtered at destination, & Failed delivery) provide you with the reasons events were dropped before reaching the destination. Discard steps also include how to control or alter that outcome, when possible. The pipeline view also shows a label between the Filtered at destination and Failed delivery steps indicating how many events are currently pending retry. 
 
 The pipeline view shows the following steps:
@@ -113,4 +115,4 @@ The Delivery Overview pipeline steps Failed on Ingest, Filtered at Source, Filte
 This table provides a list of all possible discard reasons available at each pipeline step. 
 
 {% include content/delivery-overview-discards.html %}
-<!--- not in the product yet{% include content/retl-discards.md %}--->
+<!--- not in the product yet{% include content/retl-discards.md %}--->